diff --git a/deployment/data-model-test.nix b/deployment/data-model-test.nix
index a2e0010d..eff30f76 100644
--- a/deployment/data-model-test.nix
+++ b/deployment/data-model-test.nix
@@ -95,7 +95,7 @@ in
                           lib.optionalAttrs (validRequests != { }) {
                             ${config.username} = {
                               isNormalUser = true;
-                              packages = with lib; concatMapAttrs (_name: request: attrValues request.packages) validRequests;
+                              packages = with lib; concatMap (request: attrValues request.packages) (attrValues validRequests);
                               extraGroups = lib.optional config.wheel "wheel";
                             };
                           };