diff --git a/pkgs/development/libraries/yajl/default.nix b/pkgs/development/libraries/yajl/default.nix
index afcbcafab11..2014d597d74 100644
--- a/pkgs/development/libraries/yajl/default.nix
+++ b/pkgs/development/libraries/yajl/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
 
   src = fetchurl {
     url = http://github.com/lloyd/yajl/tarball/2.0.4;
-    name = "yajl-2.0.1.tar.gz";
+    name = "${name}.tar.gz";
     sha256 = "0661bfi4hfvwg3z2pf51wqbf5qd5kfn0dk83v5s2xwhmry8rd6y1";
   };