diff --git a/pkgs/tools/package-management/nix-serve/default.nix b/pkgs/tools/package-management/nix-serve/default.nix
index 018fe9ffb89f..d87d388cd2e8 100644
--- a/pkgs/tools/package-management/nix-serve/default.nix
+++ b/pkgs/tools/package-management/nix-serve/default.nix
@@ -35,6 +35,9 @@ stdenv.mkDerivation {
                 --add-flags $out/libexec/nix-serve/nix-serve.psgi
   '';
 
+  /** The nix package that nix-serve got its nix perl bindings from. */
+  passthru.nix = nix;
+
   passthru.tests = {
     nix-serve = nixosTests.nix-serve;
     nix-serve-ssh = nixosTests.nix-serve-ssh;