diff --git a/pkgs/development/libraries/yajl/default.nix b/pkgs/development/libraries/yajl/default.nix
index 2014d597d749..079b457ab1fe 100644
--- a/pkgs/development/libraries/yajl/default.nix
+++ b/pkgs/development/libraries/yajl/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, cmake, ruby }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "yajl-2.0.4";
 
   src = fetchurl {