--- a/Pipfile
+++ b/Pipfile
@@ -4,11 +4,12 @@ verify_ssl = true
 name = "pypi"
 
 [dev-packages]
 
 [packages]
 pipenv = "==2018.5.18"
 virtualenv = "==15.2.0"
 six = "==1.10.0"
+attrs = "==18.1.0"
 
 [requires]
 python_version = "2.7"

--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,26 +1,34 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "925379349ecc7ddfa287a6618896f4d97bf387a3bb6c5ef182bd04714dbd640c"
+            "sha256": "174865e7bcc20bf18cbd51508eee71136d6319dc8d3ae2277a34547c90bf5b3f"
         },
         "pipfile-spec": 6,
         "requires": {
             "python_version": "2.7"
         },
         "sources": [
             {
                 "name": "pypi",
                 "url": "https://pypi.org/simple",
                 "verify_ssl": true
             }
         ]
     },
     "default": {
+        "attrs": {
+            "hashes": [
+                "sha256:4b90b09eeeb9b88c35bc642cbac057e45a5fd85367b985bd2809c62b7b939265",
+                "sha256:e0d0eb91441a3b53dab4d9b743eafc1ac44476296a2053b6ca3af0b139faf87b"
+            ],
+            "index": "pypi",
+            "version": "==18.1.0"
+        },
         "certifi": {
             "hashes": [
                 "sha256:13e698f54293db9f89122b0581843a782ad0934a4fe0172d2a980ba77fc61bb7",
                 "sha256:9fa520c1bacfb634fa7af20a76bcbd3d5fb390481724c597da32c719a7dca4b0"
             ],
             "version": "==2018.4.16"
         },
         "pipenv": {

deleted file mode 100644
--- a/third_party/python/attrs/moz.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
----
-schema: 1
-description: Python package that will bring back the **joy** of **writing classes** by relieving you from the drudgery of implementing object protocols.
-url: "http://www.attrs.org/"
-release: "18.1.0"
-licenses:
-    - MIT
-bugzilla:
-    product: Taskcluster
-    component: Task Configuration
-vendoring:
-    url: https://pypi.org/packages/source/a/attrs/attrs-18.1.0.tar.gz