diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3573abe8516..2cbcb8bfa1d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1678,7 +1678,7 @@ let
   };
 
   w3cCSSValidator = import ../tools/misc/w3c-css-validator {
-    inherit fetchurl stdenv apacheAnt jre sourceFromHead;
+    inherit fetchurl stdenv apacheAnt jre sourceFromHead lib;
     tomcat = tomcat6;
   };