diff --git a/ofborg/src/outpaths.nix b/ofborg/src/outpaths.nix
index 8407baef..66c7648a 100755
--- a/ofborg/src/outpaths.nix
+++ b/ofborg/src/outpaths.nix
@@ -19,6 +19,7 @@ let
 
       nixpkgsArgs = {
         config = {
+          allowAliases = false;
           allowBroken = true;
           allowUnfree = true;
           allowInsecurePredicate = x: true;
diff --git a/ofborg/src/tasks/eval/nixpkgs.rs b/ofborg/src/tasks/eval/nixpkgs.rs
index f555c7fe..7f49b5cb 100644
--- a/ofborg/src/tasks/eval/nixpkgs.rs
+++ b/ofborg/src/tasks/eval/nixpkgs.rs
@@ -445,14 +445,14 @@ impl<'a> EvaluationStrategy for NixpkgsStrategy<'a> {
                 self.nix.clone(),
             ),
             EvalChecker::new(
-                "package-list-no-aliases",
+                "package-list-with-aliases",
                 nix::Operation::QueryPackagesJson,
                 vec![
                     String::from("--file"),
                     String::from("."),
                     String::from("--arg"),
                     String::from("config"),
-                    String::from("{ allowAliases = false; }"),
+                    String::from("{ allowAliases = true; }"),
                 ],
                 self.nix.clone(),
             ),