diff --git a/pkgs/development/tools/misc/hydra/unstable.nix b/pkgs/development/tools/misc/hydra/unstable.nix
index 2759c08fbca1..709af8f44855 100644
--- a/pkgs/development/tools/misc/hydra/unstable.nix
+++ b/pkgs/development/tools/misc/hydra/unstable.nix
@@ -239,7 +239,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   passthru = {
-    inherit perlDeps;
+    inherit nix perlDeps;
     tests.basic = nixosTests.hydra.hydra_unstable;
   };