--- a/Makefile.in
+++ b/Makefile.in
@@ -300,16 +300,20 @@ ifdef SOCORRO_SYMBOL_UPLOAD_TOKEN_FILE
 	$(PYTHON) -u $(topsrcdir)/toolkit/crashreporter/tools/upload_symbols.py '$(DIST)/$(PKG_PATH)$(SYMBOL_FULL_ARCHIVE_BASENAME).zip'
 endif
 endif
 
 .PHONY: update-packaging
 update-packaging:
 	$(MAKE) -C tools/update-packaging
 
+.PHONY: package-generated-sources
+package-generated-sources:
+	$(call py_action,package_generated_sources,'$(DIST)/$(PKG_PATH)$(GENERATED_SOURCE_FILE_PACKAGE)')
+
 #XXX: this is a hack, since we don't want to clobber for MSVC
 # PGO support, but we can't do this test in client.mk
 ifneq ($(OS_ARCH)_$(GNU_CC), WINNT_)
 # No point in clobbering if PGO has been explicitly disabled.
 ifndef NO_PROFILE_GUIDED_OPTIMIZE
 maybe_clobber_profiledbuild: clean
 else
 maybe_clobber_profiledbuild:

--- a/build/moz-automation.mk
+++ b/build/moz-automation.mk
@@ -22,30 +22,32 @@ endif
 # Helper variables to convert from MOZ_AUTOMATION_* variables to the
 # corresponding the make target
 tier_MOZ_AUTOMATION_BUILD_SYMBOLS = buildsymbols
 tier_MOZ_AUTOMATION_L10N_CHECK = l10n-check
 tier_MOZ_AUTOMATION_INSTALLER = installer
 tier_MOZ_AUTOMATION_PACKAGE = package
 tier_MOZ_AUTOMATION_PACKAGE_TESTS = package-tests
 tier_MOZ_AUTOMATION_UPDATE_PACKAGING = update-packaging
+tier_MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES = package-generated-sources
 tier_MOZ_AUTOMATION_UPLOAD_SYMBOLS = uploadsymbols
 tier_MOZ_AUTOMATION_UPLOAD = upload
 
 # Automation build steps. Everything in MOZ_AUTOMATION_TIERS also gets used in
 # TIERS for mach display. As such, the MOZ_AUTOMATION_TIERS are roughly sorted
 # here in the order that they will be executed (since mach doesn't know of the
 # dependencies between them).
 moz_automation_symbols = \
   MOZ_AUTOMATION_PACKAGE_TESTS \
   MOZ_AUTOMATION_BUILD_SYMBOLS \
   MOZ_AUTOMATION_UPLOAD_SYMBOLS \
   MOZ_AUTOMATION_PACKAGE \
   MOZ_AUTOMATION_INSTALLER \
   MOZ_AUTOMATION_UPDATE_PACKAGING \
+  MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES \
   MOZ_AUTOMATION_L10N_CHECK \
   MOZ_AUTOMATION_UPLOAD \
   $(NULL)
 MOZ_AUTOMATION_TIERS := $(foreach sym,$(moz_automation_symbols),$(if $(filter 1,$($(sym))),$(tier_$(sym))))
 
 # Dependencies between automation build steps
 automation/uploadsymbols: automation/buildsymbols
 
@@ -55,16 +57,17 @@ automation/update-packaging: automation/
 automation/l10n-check: automation/package
 automation/l10n-check: automation/installer
 
 automation/upload: automation/installer
 automation/upload: automation/package
 automation/upload: automation/package-tests
 automation/upload: automation/buildsymbols
 automation/upload: automation/update-packaging
+automation/upload: automation/package-generated-sources
 
 # The installer and packager all run stage-package, and may conflict
 # with each other.
 automation/installer: automation/package
 
 automation/build: $(addprefix automation/,$(MOZ_AUTOMATION_TIERS))
 	@echo Automation steps completed.
 

--- a/build/mozconfig.artifact.automation
+++ b/build/mozconfig.artifact.automation
@@ -1,5 +1,6 @@
 # Common options for artifact builds to set automation steps.
 # This gets included before mozconfig.automation.
 
 MOZ_AUTOMATION_BUILD_SYMBOLS=0
 MOZ_AUTOMATION_L10N_CHECK=0
+MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES=0

--- a/build/mozconfig.automation
+++ b/build/mozconfig.automation
@@ -10,12 +10,13 @@
 # overridden by setting them earlier in the appropriate mozconfig.
 
 mk_add_options "export MOZ_AUTOMATION_BUILD_SYMBOLS=${MOZ_AUTOMATION_BUILD_SYMBOLS-1}"
 mk_add_options "export MOZ_AUTOMATION_L10N_CHECK=${MOZ_AUTOMATION_L10N_CHECK-1}"
 mk_add_options "export MOZ_AUTOMATION_PACKAGE=${MOZ_AUTOMATION_PACKAGE-1}"
 mk_add_options "export MOZ_AUTOMATION_PACKAGE_TESTS=${MOZ_AUTOMATION_PACKAGE_TESTS-1}"
 mk_add_options "export MOZ_AUTOMATION_INSTALLER=${MOZ_AUTOMATION_INSTALLER-0}"
 mk_add_options "export MOZ_AUTOMATION_UPDATE_PACKAGING=${MOZ_AUTOMATION_UPDATE_PACKAGING-0}"
+mk_add_options "export MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES=${MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES-1}"
 mk_add_options "export MOZ_AUTOMATION_UPLOAD=${MOZ_AUTOMATION_UPLOAD-1}"
 mk_add_options "export MOZ_AUTOMATION_UPLOAD_SYMBOLS=${MOZ_AUTOMATION_UPLOAD_SYMBOLS-0}"
 
 export MOZ_AUTOMATION_MOZCONFIG=1

--- a/mobile/android/config/mozconfigs/android-api-15-frontend/nightly
+++ b/mobile/android/config/mozconfigs/android-api-15-frontend/nightly
@@ -2,16 +2,17 @@
 MOZ_AUTOMATION_BUILD_SYMBOLS=0
 MOZ_AUTOMATION_INSTALLER=0
 MOZ_AUTOMATION_L10N_CHECK=0
 MOZ_AUTOMATION_PACKAGE=0
 MOZ_AUTOMATION_PACKAGE_TESTS=0
 MOZ_AUTOMATION_UPDATE_PACKAGING=0
 MOZ_AUTOMATION_UPLOAD=0
 MOZ_AUTOMATION_UPLOAD_SYMBOLS=0
+MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES=0
 
 NO_CACHE=1
 NO_NDK=1
 
 . "$topsrcdir/mobile/android/config/mozconfigs/common"
 
 ac_add_options --with-gradle="$topsrcdir/gradle-dist/bin/gradle"
 export GRADLE_MAVEN_REPOSITORIES="file://$topsrcdir/jcenter","file://$topsrcdir/google"

--- a/mobile/android/config/mozconfigs/android-api-15-gradle-dependencies/nightly
+++ b/mobile/android/config/mozconfigs/android-api-15-gradle-dependencies/nightly
@@ -2,16 +2,17 @@
 MOZ_AUTOMATION_BUILD_SYMBOLS=0
 MOZ_AUTOMATION_INSTALLER=0
 MOZ_AUTOMATION_L10N_CHECK=0
 MOZ_AUTOMATION_PACKAGE=0
 MOZ_AUTOMATION_PACKAGE_TESTS=0
 MOZ_AUTOMATION_UPDATE_PACKAGING=0
 MOZ_AUTOMATION_UPLOAD=0
 MOZ_AUTOMATION_UPLOAD_SYMBOLS=0
+MOZ_AUTOMATION_PACKAGE_GENERATED_SOURCES=0
 
 NO_CACHE=1
 NO_NDK=1
 
 . "$topsrcdir/mobile/android/config/mozconfigs/common"
 
 # We want to download Gradle.
 ac_add_options --with-gradle

--- a/mobile/android/config/mozconfigs/android-api-15-gradle/nightly-artifact
+++ b/mobile/android/config/mozconfigs/android-api-15-gradle/nightly-artifact
@@ -1,10 +1,9 @@
-MOZ_AUTOMATION_BUILD_SYMBOLS=0
-MOZ_AUTOMATION_L10N_CHECK=0
+. "$topsrcdir/build/mozconfig.artifact.automation"
 
 NO_CACHE=1
 NO_NDK=1
 
 . "$topsrcdir/mobile/android/config/mozconfigs/common"
 
 . "$topsrcdir/mobile/android/config/mozconfigs/android-api-15-gradle/nightly"
 

--- a/mobile/android/config/mozconfigs/android-api-15/debug-artifact
+++ b/mobile/android/config/mozconfigs/android-api-15/debug-artifact
@@ -1,10 +1,9 @@
-MOZ_AUTOMATION_BUILD_SYMBOLS=0
-MOZ_AUTOMATION_L10N_CHECK=0
+. "$topsrcdir/build/mozconfig.artifact.automation"
 
 NO_CACHE=1
 NO_NDK=1
 
 . "$topsrcdir/mobile/android/config/mozconfigs/common"
 
 # Global options
 ac_add_options --enable-debug

--- a/mobile/android/config/mozconfigs/android-api-15/nightly-artifact
+++ b/mobile/android/config/mozconfigs/android-api-15/nightly-artifact
@@ -1,10 +1,9 @@
-MOZ_AUTOMATION_BUILD_SYMBOLS=0
-MOZ_AUTOMATION_L10N_CHECK=0
+. "$topsrcdir/build/mozconfig.artifact.automation"
 
 NO_CACHE=1
 NO_NDK=1
 
 . "$topsrcdir/mobile/android/config/mozconfigs/common"
 
 . "$topsrcdir/mobile/android/config/mozconfigs/android-api-15/nightly"
 

--- a/mobile/android/config/mozconfigs/android-x86/nightly-artifact
+++ b/mobile/android/config/mozconfigs/android-x86/nightly-artifact
@@ -1,10 +1,9 @@
-MOZ_AUTOMATION_BUILD_SYMBOLS=0
-MOZ_AUTOMATION_L10N_CHECK=0
+. "$topsrcdir/build/mozconfig.artifact.automation"
 
 NO_CACHE=1
 NO_NDK=1
 
 . "$topsrcdir/mobile/android/config/mozconfigs/common"
 
 . "$topsrcdir/mobile/android/config/mozconfigs/android-x86/nightly"
 

new file mode 100644
--- /dev/null
+++ b/python/mozbuild/mozbuild/action/package_generated_sources.py
@@ -0,0 +1,30 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+import argparse
+import json
+import os.path
+import sys
+
+import buildconfig
+from mozpack.archive import create_tar_gz_from_files
+from mozbuild.generated_sources import get_generated_sources
+
+
+def main(argv):
+    parser = argparse.ArgumentParser(
+        description='Produce archive of generated sources')
+    parser.add_argument('outputfile', help='File to write output to')
+    args = parser.parse_args(argv)
+
+
+    files = dict(get_generated_sources())
+    with open(args.outputfile, 'wb') as fh:
+        create_tar_gz_from_files(fh, files, compresslevel=5)
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[1:]))

new file mode 100644
--- /dev/null
+++ b/python/mozbuild/mozbuild/generated_sources.py
@@ -0,0 +1,40 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import json
+import os
+
+from mozpack.files import FileFinder
+import mozpack.path as mozpath
+
+
+def get_generated_sources():
+    '''
+    Yield tuples of `(objdir-rel-path, file)` for generated source files
+    in this objdir, where `file` is either an absolute path to the file or
+    a `mozpack.File` instance.
+    '''
+    import buildconfig
+
+    # First, get the list of generated sources produced by the build backend.
+    gen_sources = os.path.join(buildconfig.topobjdir, 'generated-sources.json')
+    with open(gen_sources, 'rb') as f:
+        data = json.load(f)
+    for f in data['sources']:
+        yield f, mozpath.join(buildconfig.topobjdir, f)
+    # Next, return all the files in $objdir/ipc/ipdl/_ipdlheaders.
+    base = 'ipc/ipdl/_ipdlheaders'
+    finder = FileFinder(mozpath.join(buildconfig.topobjdir, base))
+    for p, f in finder.find('**/*.h'):
+        yield mozpath.join(base, p), f
+    # Next, return any Rust source files that were generated into the Rust
+    # object directory.
+    rust_build_kind = 'debug' if buildconfig.substs.get('MOZ_DEBUG_RUST') else 'release'
+    base = mozpath.join('toolkit/library',
+                        buildconfig.substs['RUST_TARGET'],
+                        rust_build_kind,
+                        'build')
+    finder = FileFinder(mozpath.join(buildconfig.topobjdir, base))
+    for p, f in finder.find('**/*.rs'):
+        yield mozpath.join(base, p), f

--- a/toolkit/mozapps/installer/package-name.mk
+++ b/toolkit/mozapps/installer/package-name.mk
@@ -75,16 +75,19 @@ LANGPACK = $(PKG_LANGPACK_PATH)$(PKG_LAN
 PKG_SRCPACK_BASENAME = $(MOZ_PKG_APPNAME)-$(MOZ_PKG_VERSION).source
 PKG_BUNDLE_BASENAME = $(MOZ_PKG_APPNAME)-$(MOZ_PKG_VERSION)
 PKG_SRCPACK_PATH =
 
 # Symbol package naming
 SYMBOL_FULL_ARCHIVE_BASENAME = $(PKG_BASENAME).crashreporter-symbols-full
 SYMBOL_ARCHIVE_BASENAME = $(PKG_BASENAME).crashreporter-symbols
 
+# Generated file package naming
+GENERATED_SOURCE_FILE_PACKAGE = $(PKG_BASENAME).generated-files.tar.gz
+
 # Code coverage package naming
 CODE_COVERAGE_ARCHIVE_BASENAME = $(PKG_BASENAME).code-coverage-gcno
 
 # Mozharness naming
 MOZHARNESS_PACKAGE = mozharness.zip
 
 # Test package naming
 TEST_PACKAGE = $(PKG_BASENAME).common.tests.zip

--- a/toolkit/mozapps/installer/upload-files.mk
+++ b/toolkit/mozapps/installer/upload-files.mk
@@ -394,16 +394,17 @@ UPLOAD_FILES= \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(XPC_TEST_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(MOCHITEST_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(TALOS_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(AWSY_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(REFTEST_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(WP_TEST_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(GTEST_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(SYMBOL_ARCHIVE_BASENAME).zip) \
+  $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(GENERATED_SOURCE_FILE_PACKAGE)) \
   $(call QUOTED_WILDCARD,$(MOZ_SOURCESTAMP_FILE)) \
   $(call QUOTED_WILDCARD,$(MOZ_BUILDINFO_FILE)) \
   $(call QUOTED_WILDCARD,$(MOZ_BUILDID_INFO_TXT_FILE)) \
   $(call QUOTED_WILDCARD,$(MOZ_MOZINFO_FILE)) \
   $(call QUOTED_WILDCARD,$(MOZ_TEST_PACKAGES_FILE)) \
   $(call QUOTED_WILDCARD,$(PKG_JSSHELL)) \
   $(call QUOTED_WILDCARD,$(DIST)/$(PKG_PATH)$(SYMBOL_FULL_ARCHIVE_BASENAME).zip) \
   $(call QUOTED_WILDCARD,$(topobjdir)/browser/installer/windows/instgen/setup.exe) \