diff --git a/lass/1systems/prism.nix b/lass/1systems/prism.nix
index 4c0b4e690..e69fc545f 100644
--- a/lass/1systems/prism.nix
+++ b/lass/1systems/prism.nix
@@ -18,10 +18,6 @@ in {
       imports = [
         ../2configs/buildbot-standalone.nix
       ];
-      krebs.build.source.nixpkgs = lib.mkForce {
-        url = https://github.com/NixOS/nixpkgs;
-        rev = "0d05f172b27e94d9eea3257f42d7e03371e63acc";
-      };
     }
     {
       users.extraGroups = {