--- a/taskcluster/ci/android-stuff/kind.yml
+++ b/taskcluster/ci/android-stuff/kind.yml
@@ -62,16 +62,18 @@ jobs:
         scopes:
           - docker-worker:relengapi-proxy:tooltool.download.internal
           - docker-worker:relengapi-proxy:tooltool.download.public
         optimizations:
           - - skip-unless-changed
             - - "mobile/android/config/**"
               - "testing/mozharness/configs/builds/releng_sub_android_configs/*gradle_dependencies.py"
               - "**/*.gradle"
+        toolchains:
+          - linux64-sccache
 
     android-test:
         description: "Android armv7 unit tests"
         treeherder:
             platform: android-4-0-armv7-api15/opt
             kind: test
             tier: 2
             symbol: tc(test)
@@ -110,16 +112,18 @@ jobs:
             max-run-time: 36000
         scopes:
           - docker-worker:relengapi-proxy:tooltool.download.internal
           - docker-worker:relengapi-proxy:tooltool.download.public
         optimizations:
           - - skip-unless-changed
             - - "mobile/android/base/**"
               - "mobile/android/tests/background/junit4/**"
+        toolchains:
+          - linux64-sccache
 
     android-lint:
         description: "Android lint"
         treeherder:
             platform: android-4-0-armv7-api15/opt
             kind: test
             tier: 2
             symbol: tc(lint)
@@ -180,16 +184,18 @@ jobs:
               - "mobile/android/**/*.jpeg"
               - "mobile/android/**/*.jpg"
               - "mobile/android/**/*.png"
               - "mobile/android/**/*.svg"
               - "mobile/android/**/*.xml" # Manifest & android resources
               - "mobile/android/**/*.gradle"
               - "mobile/android/**/Makefile.in"
               - "mobile/android/**/moz.build"
+        toolchains:
+          - linux64-sccache
 
     android-checkstyle:
         description: "Android checkstyle"
         treeherder:
             platform: android-4-0-armv7-api15/opt
             kind: test
             tier: 2
             symbol: tc(checkstyle)
@@ -234,16 +240,18 @@ jobs:
           - docker-worker:relengapi-proxy:tooltool.download.public
         optimizations:
           - - skip-unless-changed
             - - "mobile/android/**/checkstyle.xml"
               - "mobile/android/**/*.java"
               - "mobile/android/**/*.gradle"
               - "mobile/android/**/Makefile.in"
               - "mobile/android/**/moz.build"
+        toolchains:
+          - linux64-sccache
 
     android-findbugs:
         description: "Android findbugs"
         treeherder:
             platform: android-4-0-armv7-api15/opt
             kind: test
             tier: 2
             symbol: tc(findbugs)
@@ -293,8 +301,10 @@ jobs:
           - docker-worker:relengapi-proxy:tooltool.download.internal
           - docker-worker:relengapi-proxy:tooltool.download.public
         optimizations:
           - - skip-unless-changed
             - - "mobile/android/**/*.java"
               - "mobile/android/**/*.gradle"
               - "mobile/android/**/Makefile.in"
               - "mobile/android/**/moz.build"
+        toolchains:
+          - linux64-sccache

--- a/taskcluster/ci/artifact-build/kind.yml
+++ b/taskcluster/ci/artifact-build/kind.yml
@@ -36,9 +36,10 @@ jobs:
             config:
                 - builds/releng_sub_linux_configs/64_artifact.py
                 - balrog/production.py
             script: "mozharness/scripts/fx_desktop_build.py"
             secrets: true
             tooltool-downloads: public
             need-xvfb: true
             keep-artifacts: false
-
+        toolchains:
+          - linux64-sccache

--- a/taskcluster/ci/build/android.yml
+++ b/taskcluster/ci/build/android.yml
@@ -17,16 +17,18 @@ android-api-15/debug:
         config:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: api-15-debug
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 android-x86/opt:
     description: "Android 4.2 x86 Opt"
     index:
         product: mobile
         job-name: android-x86-opt
     treeherder:
         platform: android-4-2-x86/opt
@@ -42,16 +44,18 @@ android-x86/opt:
         config:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: x86
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 android-x86-nightly/opt:
     description: "Android 4.2 x86 Nightly"
     attributes:
         nightly: true
     index:
         product: mobile
         job-name: android-x86-opt
@@ -71,16 +75,18 @@ android-x86-nightly/opt:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: x86
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 android-api-15/opt:
     description: "Android 4.0 API15+ Opt"
     index:
         product: mobile
         job-name: android-api-15-opt
     treeherder:
         platform: android-4-0-armv7-api15/opt
@@ -96,16 +102,18 @@ android-api-15/opt:
         config:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: api-15
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 android-api-15-nightly/opt:
     description: "Android 4.0 API15+ Nightly"
     attributes:
         nightly: true
     index:
         product: mobile
         job-name: android-api-15-opt
@@ -125,16 +133,18 @@ android-api-15-nightly/opt:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: api-15
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 android-x86-old-id/opt:
     description: "Android 4.2 x86 Opt OldId"
     index:
         product: mobile
         job-name: android-x86-old-id-opt
     treeherder:
         platform: android-4-2-x86-old-id/opt
@@ -151,16 +161,18 @@ android-x86-old-id/opt:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: x86-old-id
         tooltool-downloads: internal
     run-on-projects: [ 'mozilla-central' ]
+    toolchains:
+        - linux64-sccache
 
 android-x86-old-id-nightly/opt:
     description: "Android 4.2 x86 OldId Nightly"
     attributes:
         nightly: true
     index:
         product: mobile
         job-name: android-x86-old-id-opt
@@ -181,16 +193,18 @@ android-x86-old-id-nightly/opt:
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: x86-old-id
         tooltool-downloads: internal
     run-on-projects: [ 'mozilla-central' ]
+    toolchains:
+        - linux64-sccache
 
 android-api-15-old-id/opt:
     description: "Android 4.0 API15+ Opt OldId"
     index:
         product: mobile
         job-name: android-api-15-old-id-opt
     treeherder:
         platform: android-4-0-armv7-api15-old-id/opt
@@ -207,16 +221,18 @@ android-api-15-old-id/opt:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: api-15-old-id
         tooltool-downloads: internal
     run-on-projects: [ 'mozilla-central' ]
+    toolchains:
+        - linux64-sccache
 
 android-api-15-old-id-nightly/opt:
     description: "Android 4.0 API15+ OldId Nightly"
     attributes:
         nightly: true
     index:
         product: mobile
         job-name: android-api-15-old-id-opt
@@ -237,16 +253,18 @@ android-api-15-old-id-nightly/opt:
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: api-15-old-id
         tooltool-downloads: internal
     run-on-projects: [ 'mozilla-central' ]
+    toolchains:
+        - linux64-sccache
 
 android-api-15-gradle/opt:
     description: "Android 4.0 API15+ (Gradle) Opt"
     index:
         product: mobile
         job-name: android-api-15-gradle-opt
     treeherder:
         platform: android-api-15-gradle/opt
@@ -275,16 +293,18 @@ android-api-15-gradle/opt:
         config:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: api-15-gradle
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 android-aarch64/opt:
     description: "Android 5.0 AArch64 Opt"
     index:
         product: mobile
         job-name: android-aarch64-opt
     treeherder:
         platform: android-5-0-aarch64/opt
@@ -300,16 +320,18 @@ android-aarch64/opt:
         config:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: aarch64
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 android-aarch64-nightly/opt:
     description: "Android 5.0 AArch64 Nightly"
     attributes:
         nightly: true
     index:
         product: mobile
         job-name: android-aarch64-opt
@@ -329,8 +351,10 @@ android-aarch64-nightly/opt:
             - builds/releng_base_android_64_builds.py
             - disable_signing.py
             - platform_supports_post_upload_to_latest.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: aarch64
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache

--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/ci/build/linux.yml
@@ -16,16 +16,18 @@ linux64/opt:
         actions: [get-secrets build check-test update]
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-dmd/opt:
     description: "Linux64 DMD Opt"
     index:
         product: firefox
         job-name: linux64-dmd-opt
     treeherder:
         platform: linux64-dmd/opt
@@ -42,16 +44,18 @@ linux64-dmd/opt:
         config:
             - builds/releng_base_linux_64_builds.py
         script: "mozharness/scripts/fx_desktop_build.py"
         custom-build-variant-cfg: dmd
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: [ ]
+    toolchains:
+        - linux64-sccache
 
 linux64/pgo:
     description: "Linux64 PGO"
     index:
         product: firefox
         job-name: linux64-pgo
     treeherder:
         platform: linux64/pgo
@@ -68,16 +72,18 @@ linux64/pgo:
         options: [enable-pgo]
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64/debug:
     description: "Linux64 Debug"
     index:
         product: firefox
         job-name: linux64-debug
     treeherder:
         platform: linux64/debug
@@ -93,16 +99,18 @@ linux64/debug:
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: debug
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-devedition-nightly/opt:
     description: "Linux64 devedition Nightly"
     attributes:
         nightly: true
     index:
         product: devedition
         job-name: linux64-opt
@@ -123,16 +131,18 @@ linux64-devedition-nightly/opt:
             - disable_signing.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
         custom-build-variant-cfg: devedition
     run-on-projects: [ 'mozilla-beta', ]
+    toolchains:
+        - linux64-sccache
 
 linux64-base-toolchains/opt:
     description: "Linux64 base toolchains Opt"
     index:
         product: firefox
         job-name: linux64-base-toolchains-opt
     treeherder:
         platform: linux64/opt
@@ -148,16 +158,18 @@ linux64-base-toolchains/opt:
         actions: [get-secrets build check-test update]
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-base-toolchains/debug:
     description: "Linux64 base toolchains Debug"
     index:
         product: firefox
         job-name: linux64-base-toolchains-debug
     treeherder:
         platform: linux64/debug
@@ -174,16 +186,18 @@ linux64-base-toolchains/debug:
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: debug
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux/opt:
     description: "Linux32 Opt"
     index:
         product: firefox
         job-name: linux-opt
     treeherder:
         platform: linux32/opt
@@ -199,16 +213,18 @@ linux/opt:
         actions: [get-secrets build check-test update]
         config:
             - builds/releng_base_linux_32_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux/debug:
     description: "Linux32 Debug"
     index:
         product: firefox
         job-name: linux-debug
     treeherder:
         platform: linux32/debug
@@ -225,16 +241,18 @@ linux/debug:
         config:
             - builds/releng_base_linux_32_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: debug
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux/pgo:
     description: "Linux32 PGO"
     index:
         product: firefox
         job-name: linux-pgo
     treeherder:
         platform: linux32/pgo
@@ -251,16 +269,18 @@ linux/pgo:
         options: [enable-pgo]
         config:
             - builds/releng_base_linux_32_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux-devedition-nightly/opt:
     description: "Linux32 devedition Nightly"
     attributes:
         nightly: true
     index:
         product: devedition
         job-name: linux-opt
@@ -281,16 +301,18 @@ linux-devedition-nightly/opt:
             - disable_signing.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
         custom-build-variant-cfg: devedition
     run-on-projects: [ 'mozilla-beta', ]
+    toolchains:
+        - linux64-sccache
 
 linux-nightly/opt:
     description: "Linux32 Nightly"
     attributes:
         nightly: true
     index:
         product: firefox
         job-name: linux-opt
@@ -309,16 +331,18 @@ linux-nightly/opt:
         config:
             - builds/releng_base_linux_32_builds.py
             - disable_signing.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 
 linux64-asan/opt:
     description: "Linux64 Opt ASAN"
     index:
         product: firefox
         job-name: linux64-asan-opt
     treeherder:
@@ -336,16 +360,18 @@ linux64-asan/opt:
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: asan-tc
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 
 linux64-asan-fuzzing/opt:
     description: "Linux64 Fuzzing Opt ASAN"
     index:
         product: firefox
         job-name: linux64-fuzzing-asan-opt
     treeherder:
@@ -363,16 +389,18 @@ linux64-asan-fuzzing/opt:
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: fuzzing-asan-tc
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-asan/debug:
     description: "Linux64 Debug ASAN"
     index:
         product: firefox
         job-name: linux64-asan-debug
     treeherder:
         platform: linux64/asan
@@ -389,16 +417,18 @@ linux64-asan/debug:
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: asan-tc-and-debug
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-nightly/opt:
     description: "Linux64 Nightly"
     attributes:
         nightly: true
     index:
         product: firefox
         job-name: linux64-opt
@@ -417,16 +447,18 @@ linux64-nightly/opt:
         config:
             - builds/releng_base_linux_64_builds.py
             - disable_signing.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-noopt/debug:
     description: "Linux64 No-optimize Debug"
     index:
         product: firefox
         job-name: linux64-noopt-debug
     treeherder:
         platform: linux64-noopt/debug
@@ -445,16 +477,18 @@ linux64-noopt/debug:
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: noopt-debug
         tooltool-downloads: public
         keep-artifacts: false
         need-xvfb: true
     run-on-projects: [ 'trunk', 'try' ]
+    toolchains:
+        - linux64-sccache
 
 linux64-jsdcov/opt:
     description: "Linux64-JSDCov Opt"
     index:
         product: firefox
         job-name: linux64-jsdcov-opt
     treeherder:
         platform: linux64-jsdcov/opt
@@ -471,16 +505,18 @@ linux64-jsdcov/opt:
         actions: [get-secrets build check-test update]
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-ccov/opt:
     description: "Linux64-CCov Opt"
     index:
         product: firefox
         job-name: linux64-ccov-opt
     needs-sccache: false
     treeherder:
@@ -499,16 +535,18 @@ linux64-ccov/opt:
         config:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: code-coverage
         tooltool-downloads: public
         need-xvfb: true
+    toolchains:
+        - linux64-sccache
 
 linux64-add-on-devel/opt:
     description: "Linux64 add-on-devel"
     index:
         product: firefox
         job-name: linux64-add-on-devel
     treeherder:
         platform: linux64-add-on-devel/opt
@@ -526,8 +564,10 @@ linux64-add-on-devel/opt:
             - builds/releng_base_linux_64_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: add-on-devel
         tooltool-downloads: public
         need-xvfb: true
     run-on-projects: [ 'mozilla-beta', 'mozilla-release', 'mozilla-esr45' ]
+    toolchains:
+        - linux64-sccache

--- a/taskcluster/ci/build/macosx.yml
+++ b/taskcluster/ci/build/macosx.yml
@@ -16,16 +16,18 @@ macosx64/debug:
         using: mozharness
         actions: [get-secrets build update]
         config:
             - builds/releng_base_mac_64_cross_builds.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: cross-debug
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 macosx64/opt:
     description: "MacOS X x64 Cross-compile"
     index:
         product: firefox
         job-name: macosx64-opt
     treeherder:
         platform: osx-cross/opt
@@ -39,16 +41,18 @@ macosx64/opt:
     run:
         using: mozharness
         actions: [get-secrets build update]
         config:
             - builds/releng_base_mac_64_cross_builds.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache
 
 macosx64-dmd/opt:
     description: "MacOS X x64 DMD Cross-compile"
     index:
         product: firefox
         job-name: macosx64-dmd-opt
     treeherder:
         platform: osx-10-10-dmd/opt
@@ -64,16 +68,18 @@ macosx64-dmd/opt:
         actions: [get-secrets build update]
         config:
             - builds/releng_base_mac_64_cross_builds.py
         script: "mozharness/scripts/fx_desktop_build.py"
         custom-build-variant-cfg: dmd
         secrets: true
         tooltool-downloads: internal
     run-on-projects: [ ]
+    toolchains:
+        - linux64-sccache
 
 macosx64-devedition/opt:
     description: "MacOS X Dev Edition x64"
     index:
         product: devedition
         job-name: macosx64-devedition-opt
     treeherder:
         platform: osx-cross-devedition/opt
@@ -88,16 +94,18 @@ macosx64-devedition/opt:
         using: mozharness
         actions: [get-secrets build update]
         config:
             - builds/releng_base_mac_64_cross_builds.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: internal
     run-on-projects: ['mozilla-beta',]
+    toolchains:
+        - linux64-sccache
 
 macosx64-noopt/debug:
     description: "MacOS X x64 No-optimize Debug"
     index:
         product: firefox
         job-name: macosx64-noopt-debug
     treeherder:
         platform: osx-cross-noopt/debug
@@ -116,16 +124,18 @@ macosx64-noopt/debug:
             - builds/releng_base_mac_64_cross_builds.py
             - balrog/production.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         custom-build-variant-cfg: cross-noopt-debug
         tooltool-downloads: internal
         keep-artifacts: false
     run-on-projects: [ 'trunk', 'try' ]
+    toolchains:
+        - linux64-sccache
 
 macosx64-add-on-devel/opt:
     description: "MacOS X x64 add-on-devel"
     index:
         product: firefox
         job-name: macosx64-add-on-devel
     treeherder:
         platform: osx-cross-add-on-devel/opt
@@ -142,16 +152,18 @@ macosx64-add-on-devel/opt:
        config:
             - builds/releng_base_mac_64_cross_builds.py
             - balrog/production.py
        script: "mozharness/scripts/fx_desktop_build.py"
        secrets: true
        custom-build-variant-cfg: add-on-devel
        tooltool-downloads: internal
     run-on-projects: [ 'mozilla-beta', 'mozilla-release', 'mozilla-esr45' ]
+    toolchains:
+        - linux64-sccache
 
 macosx64-nightly/opt:
     description: "MacOS X x64 Cross-compile Nightly"
     attributes:
         nightly: true
     index:
         product: firefox
         job-name: macosx64-opt
@@ -170,8 +182,10 @@ macosx64-nightly/opt:
         actions: [get-secrets build update]
         config:
             - builds/releng_base_mac_64_cross_builds.py
             - disable_signing.py
             - taskcluster_nightly.py
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: internal
+    toolchains:
+        - linux64-sccache

--- a/taskcluster/ci/build/windows.yml
+++ b/taskcluster/ci/build/windows.yml
@@ -12,16 +12,18 @@ win32/debug:
         max-run-time: 7200
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_32_debug.py
+    toolchains:
+        - win64-sccache
 
 win32/opt:
     description: "Win32 Opt"
     index:
         product: firefox
         job-name: win32-opt
     treeherder:
         platform: windows2012-32/opt
@@ -32,16 +34,18 @@ win32/opt:
         max-run-time: 7200
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_32_opt.py
+    toolchains:
+        - win64-sccache
 
 win32-dmd/opt:
     description: "Win32 DMD Opt"
     index:
         product: firefox
         job-name: win32-dmd-opt
     treeherder:
         platform: windows2012-32-dmd/opt
@@ -54,16 +58,18 @@ win32-dmd/opt:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_32_opt.py
         custom-build-variant-cfg: dmd
     run-on-projects: [ ]
+    toolchains:
+        - win64-sccache
 
 win32/pgo:
     description: "Win32 Opt PGO"
     index:
         product: firefox
         job-name: win32-pgo
     treeherder:
         platform: windows2012-32/pgo
@@ -75,16 +81,18 @@ win32/pgo:
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
     run:
         using: mozharness
         options: [enable-pgo]
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_32_opt.py
+    toolchains:
+        - win64-sccache
 
 win64/debug:
     description: "Win64 Debug"
     index:
         product: firefox
         job-name: win64-debug
     treeherder:
         platform: windows2012-64/debug
@@ -95,16 +103,18 @@ win64/debug:
         max-run-time: 7200
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_64_debug.py
+    toolchains:
+        - win64-sccache
 
 win64/opt:
     description: "Win64 Opt"
     index:
         product: firefox
         job-name: win64-opt
     treeherder:
         platform: windows2012-64/opt
@@ -115,16 +125,18 @@ win64/opt:
         max-run-time: 7200
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_64_opt.py
+    toolchains:
+        - win64-sccache
 
 win64-dmd/opt:
     description: "Win64 DMD Opt"
     index:
         product: firefox
         job-name: win64-dmd-opt
     treeherder:
         platform: windows2012-64-dmd/opt
@@ -137,16 +149,18 @@ win64-dmd/opt:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_64_opt.py
         custom-build-variant-cfg: dmd
     run-on-projects: [ ]
+    toolchains:
+        - win64-sccache
 
 win32-nightly/opt:
     description: "Win32 Nightly"
     index:
         product: firefox
         job-name: win32-opt
         type: nightly
     attributes:
@@ -163,16 +177,18 @@ win32-nightly/opt:
     run:
         using: mozharness
         actions: [clone-tools, build, check-test, update]
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_32_opt.py
             - disable_signing.py
             - taskcluster_nightly.py
+    toolchains:
+        - win64-sccache
 
 win64-nightly/opt:
     description: "Win64 Nightly"
     index:
         product: firefox
         job-name: win64-opt
         type: nightly
     attributes:
@@ -189,16 +205,18 @@ win64-nightly/opt:
     run:
         using: mozharness
         actions: [clone-tools, build, check-test, update]
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_64_opt.py
             - disable_signing.py
             - taskcluster_nightly.py
+    toolchains:
+        - win64-sccache
 
 win64/pgo:
     description: "Win64 Opt PGO"
     index:
         product: firefox
         job-name: win64-pgo
     treeherder:
         platform: windows2012-64/pgo
@@ -210,16 +228,18 @@ win64/pgo:
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
     run:
         using: mozharness
         options: [enable-pgo]
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_64_opt.py
+    toolchains:
+        - win64-sccache
 
 win32-add-on-devel/opt:
     description: "Windows32 add-on-devel"
     index:
         product: firefox
         job-name: win32-add-on-devel
     treeherder:
         platform: windows2012-32-add-on-devel/opt
@@ -232,16 +252,18 @@ win32-add-on-devel/opt:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
     run:
         using: mozharness
         script: "mozharness/scripts/fx_desktop_build.py"
         config:
             - builds/taskcluster_firefox_windows_32_addondevel.py
             - balrog/production.py
     run-on-projects: [ 'mozilla-beta', 'mozilla-release', 'mozilla-esr45' ]
+    toolchains:
+        - win64-sccache
 
 win64-add-on-devel/opt:
     description: "Windows64 add-on-devel"
     index:
         product: firefox
         job-name: win64-add-on-devel
     treeherder:
         platform: windows2012-64-add-on-devel/opt
@@ -254,16 +276,18 @@ win64-add-on-devel/opt:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
     run:
         using: mozharness
         script: "mozharness/scripts/fx_desktop_build.py"
         config:
             - builds/taskcluster_firefox_windows_64_addondevel.py
             - balrog/production.py
     run-on-projects: [ 'mozilla-beta', 'mozilla-release', 'mozilla-esr45' ]
+    toolchains:
+        - win64-sccache
 
 win64-noopt/debug:
     description: "Win64 No-optimize Debug"
     index:
         product: firefox
         job-name: win64-noopt-debug
     treeherder:
         platform: windows2012-64-noopt/debug
@@ -275,16 +299,18 @@ win64-noopt/debug:
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_win64_noopt_debug.py
     run-on-projects: [ 'trunk', 'try' ]
+    toolchains:
+        - win64-sccache
 
 win32-noopt/debug:
     description: "Win32 No-optimize Debug"
     index:
         product: firefox
         job-name: win32-noopt-debug
     treeherder:
         platform: windows2012-32-noopt/debug
@@ -296,16 +322,18 @@ win32-noopt/debug:
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_win32_noopt_debug.py
     run-on-projects: [ 'trunk', 'try' ]
+    toolchains:
+        - win64-sccache
 
 win64-asan/debug:
     description: "Win64 Debug ASAN"
     index:
         product: firefox
         job-name: win64-asan-debug
     treeherder:
         platform: windows2012-64/asan
@@ -317,16 +345,18 @@ win64-asan/debug:
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/clang.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_win64_asan_debug.py
     run-on-projects: []
+    toolchains:
+        - win64-sccache
 
 win64-asan/opt:
     description: "Win64 Opt ASAN"
     index:
         product: firefox
         job-name: win64-asan-opt
     treeherder:
         platform: windows2012-64/asan
@@ -338,8 +368,10 @@ win64-asan/opt:
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/clang.manifest"
     run:
         using: mozharness
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_win64_asan_opt.py
     run-on-projects: []
+    toolchains:
+        - win64-sccache

--- a/taskcluster/ci/hazard/kind.yml
+++ b/taskcluster/ci/hazard/kind.yml
@@ -38,16 +38,18 @@ jobs:
             using: hazard
             command: >
                 cd /home/worker/checkouts/gecko/taskcluster/scripts/builder
                 && ./build-haz-linux.sh --project shell $HOME/workspace
         when:
             files-changed:
                 - js/public/**
                 - js/src/**
+        toolchains:
+            - linux64-sccache
 
     linux64-haz/debug:
         description: "Browser Hazard Analysis Linux"
         index:
             product: firefox
             job-name: browser-haz-debug
         treeherder:
             platform: linux64/debug
@@ -56,8 +58,10 @@ jobs:
             env:
                 TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/linux64/hazard.manifest"
         run:
             using: hazard
             mozconfig: "browser/config/mozconfigs/linux64/hazards"
             command: >
                 cd /home/worker/checkouts/gecko/taskcluster/scripts/builder
                 && ./build-haz-linux.sh --project browser $HOME/workspace
+        toolchains:
+            - linux64-sccache

--- a/taskcluster/ci/spidermonkey/kind.yml
+++ b/taskcluster/ci/spidermonkey/kind.yml
@@ -53,16 +53,18 @@ job-defaults:
             - nsprpub/**
             - python/**
             - taskcluster/moz.build
             - taskcluster/ci/spidermonkey/kind.yml
             - testing/mozbase/**
             - test.mozbuild
             - toolkit/mozapps/installer/package-name.mk
             - toolkit/mozapps/installer/upload-files.mk
+    toolchains:
+        - linux64-sccache
 
 jobs:
     sm-package/opt:
         description: "Spidermonkey source package and test"
         index:
             job-name: sm-package-opt
         treeherder:
             symbol: SM-tc(pkg)

--- a/taskcluster/ci/static-analysis/kind.yml
+++ b/taskcluster/ci/static-analysis/kind.yml
@@ -38,16 +38,18 @@ jobs:
             using: mozharness
             actions: [build]
             config:
                 - builds/releng_sub_linux_configs/64_stat_and_debug.py
                 - balrog/production.py
             script: "mozharness/scripts/fx_desktop_build.py"
             tooltool-downloads: public
             keep-artifacts: false
+        toolchains:
+            - linux64-sccache
 
     linux64-st-an/opt:
         description: "Linux64 Opt Static Analysis"
         index:
             job-name: linux64-st-an-opt
         treeherder:
             platform: linux64/opt
         worker-type: aws-provisioner-v1/gecko-{level}-b-linux
@@ -60,16 +62,18 @@ jobs:
             using: mozharness
             actions: [build]
             config:
                 - builds/releng_sub_linux_configs/64_stat_and_opt.py
                 - balrog/production.py
             script: "mozharness/scripts/fx_desktop_build.py"
             tooltool-downloads: public
             keep-artifacts: false
+        toolchains:
+            - linux64-sccache
 
     win32-st-an/debug:
         description: "Win32 Static Analysis Debug (clang-cl)"
         index:
             product: firefox
             job-name: win32-st-an-debug
         treeherder:
             platform: windows2012-32/debug
@@ -80,16 +84,18 @@ jobs:
             max-run-time: 7200
             env:
                 TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/clang.manifest"
         run:
             using: mozharness
             script: mozharness/scripts/fx_desktop_build.py
             config:
                 - builds/taskcluster_firefox_win32_clang_debug.py
+        toolchains:
+            - win64-sccache
 
     win32-st-an/opt:
         description: "Win32 Static Analysis Opt (clang-cl)"
         index:
             product: firefox
             job-name: win32-st-an-opt
         treeherder:
             platform: windows2012-32/opt
@@ -100,16 +106,18 @@ jobs:
             max-run-time: 7200
             env:
                 TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/clang.manifest"
         run:
             using: mozharness
             script: mozharness/scripts/fx_desktop_build.py
             config:
                 - builds/taskcluster_firefox_win32_clang.py
+        toolchains:
+            - win64-sccache
 
     win64-st-an/debug:
         description: "Win64 Static Analysis Debug (clang-cl)"
         index:
             product: firefox
             job-name: win64-st-an-debug
         treeherder:
             platform: windows2012-64/debug
@@ -120,16 +128,18 @@ jobs:
             max-run-time: 7200
             env:
                 TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/clang.manifest"
         run:
             using: mozharness
             script: mozharness/scripts/fx_desktop_build.py
             config:
                 - builds/taskcluster_firefox_win64_clang_debug.py
+        toolchains:
+            - win64-sccache
 
     win64-st-an/opt:
         description: "Win64 Static Analysis Opt (clang-cl)"
         index:
             product: firefox
             job-name: win64-st-an-opt
         treeherder:
             platform: windows2012-64/opt
@@ -140,8 +150,10 @@ jobs:
             max-run-time: 7200
             env:
                 TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/clang.manifest"
         run:
             using: mozharness
             script: mozharness/scripts/fx_desktop_build.py
             config:
                 - builds/taskcluster_firefox_win64_clang.py
+        toolchains:
+            - win64-sccache

--- a/taskcluster/ci/toolchain/linux.yml
+++ b/taskcluster/ci/toolchain/linux.yml
@@ -17,16 +17,18 @@ linux64-clang:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/linux64/releng.manifest"
     run:
         using: toolchain-script
         script: build-clang-linux.sh
         resources:
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/tooltool-download.sh'
         toolchain-artifact: public/build/clang.tar.xz
+    toolchains:
+        - linux64-sccache
 
 linux64-clang-tidy:
     description: "Clang-tidy build"
     index:
         product: static-analysis
         job-name: linux64-clang-tidy
     treeherder:
         kind: build
@@ -42,16 +44,18 @@ linux64-clang-tidy:
     run:
         using: toolchain-script
         script: build-clang-tidy-linux.sh
         resources:
             - 'build/clang-plugin/**'
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/tooltool-download.sh'
         toolchain-artifact: public/build/clang-tidy.tar.xz
+    toolchains:
+        - linux64-sccache
 
 linux64-gcc:
     description: "GCC toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TL(gcc)
         tier: 1
@@ -98,16 +102,18 @@ linux64-cctools-port:
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/linux64/clang.manifest"
     run:
         using: toolchain-script
         script: build-cctools-port.sh
         resources:
             - 'taskcluster/scripts/misc/tooltool-download.sh'
         toolchain-artifact: public/build/cctools.tar.xz
+    toolchains:
+        - linux64-sccache
 
 linux64-hfsplus:
     description: "hfsplus toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TL(hfs+)
         tier: 1
@@ -119,16 +125,18 @@ linux64-hfsplus:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/linux64/clang.manifest"
     run:
         using: toolchain-script
         script: build-hfsplus-linux.sh
         resources:
             - 'build/unix/build-hfsplus/**'
             - 'taskcluster/scripts/misc/tooltool-download.sh'
         toolchain-artifact: public/build/hfsplus-tools.tar.xz
+    toolchains:
+        - linux64-sccache
 
 linux64-libdmg:
     description: "libdmg-hfsplus toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TL(libdmg-hfs+)
         tier: 1

--- a/taskcluster/ci/toolchain/macosx.yml
+++ b/taskcluster/ci/toolchain/macosx.yml
@@ -18,16 +18,18 @@ macosx64-clang:
     run:
         using: toolchain-script
         script: build-clang-macosx.sh
         tooltool-downloads: internal
         resources:
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/tooltool-download.sh'
         toolchain-artifact: public/build/clang.tar.xz
+    toolchains:
+        - linux64-sccache
 
 macosx64-clang-tidy:
     description: "Clang-tidy build"
     index:
         product: static-analysis
         job-name: macosx64-clang-tidy
     treeherder:
         kind: build
@@ -44,16 +46,18 @@ macosx64-clang-tidy:
         using: toolchain-script
         script: build-clang-tidy-macosx.sh
         tooltool-downloads: internal
         resources:
             - 'build/clang-plugin/**'
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/tooltool-download.sh'
         toolchain-artifact: public/build/clang-tidy.tar.xz
+    toolchains:
+        - linux64-sccache
 
 macosx64-cctools-port:
     description: "cctools-port toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TM(cctools)
         tier: 1
@@ -65,8 +69,10 @@ macosx64-cctools-port:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/macosx64/cross-clang.manifest"
     run:
         using: toolchain-script
         script: build-cctools-port-macosx.sh
         tooltool-downloads: internal
         resources:
             - 'taskcluster/scripts/misc/tooltool-download.sh'
         toolchain-artifact: public/build/cctools.tar.bz2
+    toolchains:
+        - linux64-sccache

--- a/taskcluster/ci/toolchain/windows.yml
+++ b/taskcluster/ci/toolchain/windows.yml
@@ -16,16 +16,18 @@ win32-clang-cl:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/build-clang-cl.manifest"
     run:
         using: toolchain-script
         script: build-clang32-windows.sh
         resources:
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/build-clang-windows-helper32.sh'
         toolchain-artifact: public/build/clang.tar.bz2
+    toolchains:
+        - win64-sccache
 
 win64-clang-cl:
     description: "Clang-cl toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TW64(clang-cl)
         tier: 2
@@ -36,16 +38,18 @@ win64-clang-cl:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/build-clang-cl.manifest"
     run:
         using: toolchain-script
         script: build-clang64-windows.sh
         resources:
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/build-clang-windows-helper64.sh'
         toolchain-artifact: public/build/clang.tar.bz2
+    toolchains:
+        - win64-sccache
 
 win32-clang-tidy:
     description: "Clang-tidy toolchain build"
     index:
         product: static-analysis
         job-name: win32-clang-tidy
     treeherder:
         kind: build
@@ -59,16 +63,18 @@ win32-clang-tidy:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/build-clang-cl.manifest"
     run:
         using: toolchain-script
         script: build-clang-tidy32-windows.sh
         resources:
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/build-clang-windows-helper32.sh'
         toolchain-artifact: public/build/clang-tidy.tar.bz2
+    toolchains:
+        - win64-sccache
 
 win64-clang-tidy:
     description: "Clang-tidy toolchain build"
     index:
         product: static-analysis
         job-name: win64-clang-tidy
     treeherder:
         kind: build
@@ -82,16 +88,18 @@ win64-clang-tidy:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/build-clang-cl.manifest"
     run:
         using: toolchain-script
         script: build-clang-tidy64-windows.sh
         resources:
             - 'build/build-clang/**'
             - 'taskcluster/scripts/misc/build-clang-windows-helper64.sh'
         toolchain-artifact: public/build/clang-tidy.tar.bz2
+    toolchains:
+        - win64-sccache
 
 win64-sccache:
     description: "sccache toolchain build"
     treeherder:
         kind: build
         platform: toolchains/opt
         symbol: TW64(sccache)
         tier: 2

--- a/taskcluster/ci/valgrind/kind.yml
+++ b/taskcluster/ci/valgrind/kind.yml
@@ -36,10 +36,10 @@ jobs:
             custom-build-variant-cfg: valgrind
             config:
                 - builds/releng_base_linux_64_builds.py
                 - balrog/production.py
             script: "mozharness/scripts/fx_desktop_build.py"
             secrets: true
             tooltool-downloads: public
             need-xvfb: true
-
-
+        toolchains:
+            - linux64-sccache