diff --git a/build01/nixpkgs-update.nix b/build01/nixpkgs-update.nix
index 83f3fc3..b49daa9 100644
--- a/build01/nixpkgs-update.nix
+++ b/build01/nixpkgs-update.nix
@@ -63,7 +63,8 @@ in
     # API_TOKEN is used by nixpkgs-update-github-releases
     environment.API_TOKEN_FILE = "/var/lib/nixpkgs-update/github_token_with_username.txt";
     # Used by nixpkgs-update-github-releases to install python dependencies
-    environment.NIX_PATH = "nixpkgs=${sources.nixpkgs}";
+    # Used by nixpkgs-update-pypi-releases
+    environment.NIX_PATH = "nixpkgs=$XDG_CACHE_HOME/nixpkgs";
 
     serviceConfig = nixpkgsUpdateServiceConfigCommon;
 
diff --git a/nix/sources.json b/nix/sources.json
index b6c30c2..f546e00 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -17,10 +17,10 @@
         "homepage": "",
         "owner": "ryantm",
         "repo": "nixpkgs-update",
-        "rev": "93d16eb8532f1d98e437500a24cc8ad2b4b2cac0",
-        "sha256": "19ifnyhw2irq17mhqsc0c9pzw59ln3vya9c3zf2hkjlqpdsgcnx1",
+        "rev": "a486177e210f3dd364c809139996d2ad7fc4cc3b",
+        "sha256": "11vk0wvcjbm50hvpppycdr9nhhbsiz05nzh3rvxk5zir7app15wq",
         "type": "tarball",
-        "url": "https://github.com/ryantm/nixpkgs-update/archive/93d16eb8532f1d98e437500a24cc8ad2b4b2cac0.tar.gz",
+        "url": "https://github.com/ryantm/nixpkgs-update/archive/a486177e210f3dd364c809139996d2ad7fc4cc3b.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs-update-github-releases": {