1 files changed, 3 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/build-support/trivial-builders/test/default.nix b/nixpkgs/pkgs/build-support/trivial-builders/test/default.nix
index 59dbba3f1841..f41372d922bb 100644
--- a/nixpkgs/pkgs/build-support/trivial-builders/test/default.nix
+++ b/nixpkgs/pkgs/build-support/trivial-builders/test/default.nix
@@ -26,6 +26,9 @@ recurseIntoAttrs {
     then references
     else {};
   writeCBin = callPackage ./writeCBin.nix {};
+  writeClosure-union = callPackage ./writeClosure-union.nix {
+    inherit (references) samples;
+  };
   writeShellApplication = callPackage ./writeShellApplication.nix {};
   writeScriptBin = callPackage ./writeScriptBin.nix {};
   writeShellScript = callPackage ./write-shell-script.nix {};