diff --git a/modules/mac.nix b/modules/mac.nix
index 123f385..2e9a7d3 100644
--- a/modules/mac.nix
+++ b/modules/mac.nix
@@ -10,6 +10,7 @@
       system = "aarch64-darwin";
       extra-platforms = [ "aarch64-darwin" "x86_64-darwin" ];
       experimental-features = [ "nix-command" "flakes" ];
+      build-users-group = "nixbld";
       trusted-users = [ "root" "larstvei" "@admin" ];
     };
   };