diff --git a/modules/plock/implementation.nix b/modules/plock/implementation.nix
index dd0ef02..c46d1a4 100644
--- a/modules/plock/implementation.nix
+++ b/modules/plock/implementation.nix
@@ -146,7 +146,7 @@ in {
              "null" "bool" "list"
            ];
            if b == null then {} else
-           if builtins.isList  then { bundledDependencies = b; } else
+           if builtins.isList b then { bundledDependencies = b; } else
            if ! b then {} else {
             bundledDependencies = builtins.attrNames (
               ( values.dependencies or {} ) // ( values.requires or {} )