diff --git a/jobsets.nix b/jobsets.nix
index 9a74fa7..f99911b 100644
--- a/jobsets.nix
+++ b/jobsets.nix
@@ -154,7 +154,7 @@ let
       description = "Test dependencies for each collectd plugin";
       nixexprpath = "collectd.nix";
       gitUrls = {
-        nixpkgs = "https://github.com/NixOS/nixpkgs.git nixos-unstable";
+        nixpkgs = "https://github.com/astro/nixpkgs.git collectd-plugins 1";
       };
     };