diff --git a/pkgs/build-support/rust/build-rust-crate/test/default.nix b/pkgs/build-support/rust/build-rust-crate/test/default.nix
index 208714152c56..c56f153b487e 100644
--- a/pkgs/build-support/rust/build-rust-crate/test/default.nix
+++ b/pkgs/build-support/rust/build-rust-crate/test/default.nix
@@ -917,6 +917,6 @@ rec {
       description = "Test cases for buildRustCrate";
       maintainers = [ ];
     };
-    constituents = builtins.attrValues tests;
+    constituents = builtins.attrValues (lib.filterAttrs (_: v: lib.isDerivation v) tests);
   };
 }