diff --git a/machines/common.nix b/machines/common.nix
index ef05b06..87a09f2 100644
--- a/machines/common.nix
+++ b/machines/common.nix
@@ -14,7 +14,7 @@ inputs:
       ];
     };
     # nix shell and nix build should use the same channel as the flake
-    registry.nixpkgs.flake = nixpkgs;
+    registry.nixpkgs.flake = inputs.nixpkgs;
   };
   nixpkgs.config.allowUnfree = true;