1 files changed, 9 insertions, 6 deletions
diff --git a/lass/1systems/blue/source.nix b/lass/1systems/blue/source.nix
index 8f748ab8f..21f3a8bd5 100644
--- a/lass/1systems/blue/source.nix
+++ b/lass/1systems/blue/source.nix
@@ -1,11 +1,14 @@
 { lib, pkgs, ... }:
 {
   nixpkgs = lib.mkForce {
-    file = toString (pkgs.fetchFromGitHub {
-      owner = "nixos";
-      repo = "nixpkgs";
-      rev = (lib.importJSON ../../../krebs/nixpkgs.json).rev;
-      sha256 = (lib.importJSON ../../../krebs/nixpkgs.json).sha256;
-    });
+    file = {
+      path = toString (pkgs.fetchFromGitHub {
+        owner = "nixos";
+        repo = "nixpkgs";
+        rev = (lib.importJSON ../../../krebs/nixpkgs.json).rev;
+        sha256 = (lib.importJSON ../../../krebs/nixpkgs.json).sha256;
+      });
+      useChecksum = true;
+    };
   };
 }