diff --git a/pkgs/build-support/trivial-builders/default.nix b/pkgs/build-support/trivial-builders/default.nix
index 2af36008c7a5..871f9722a4a2 100644
--- a/pkgs/build-support/trivial-builders/default.nix
+++ b/pkgs/build-support/trivial-builders/default.nix
@@ -624,6 +624,10 @@ rec {
     script:
     runCommand name
       (substitutions // {
+        # TODO(@Artturin:) substitutions should be inside the env attrset
+        # but users are likely passing non-substitution arguments through substitutions
+        # turn off __structuredAttrs to unbreak substituteAll
+        __structuredAttrs = false;
         inherit meta;
         inherit depsTargetTargetPropagated;
         propagatedBuildInputs =