diff --git a/pkgs/development/libraries/sdformat/default.nix b/pkgs/development/libraries/sdformat/default.nix
index 692de29afd7a..f81eb9b259e8 100644
--- a/pkgs/development/libraries/sdformat/default.nix
+++ b/pkgs/development/libraries/sdformat/default.nix
@@ -1,13 +1,10 @@
-{ stdenv, fetchurl, cmake, boost, ruby_1_9, ignition, tinyxml
+{ stdenv, fetchurl, cmake, boost, ruby, ignition, tinyxml
   , name ? "sdformat-${version}"
   , version ? "4.0.0" # versions known to work with this expression include 3.7.0
   , srchash-sha256 ? "b0f94bb40b0d83e35ff250a7916fdfd6df5cdc1e60c47bc53dd2da5e2378163e"
   , ...
   }:
 
-let 
-  ruby = ruby_1_9;
-in
 stdenv.mkDerivation rec {
   src = fetchurl { 
       url = "http://osrf-distributions.s3.amazonaws.com/sdformat/releases/${name}.tar.bz2";
@@ -26,6 +23,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = {
+    broken = true;
     platforms = stdenv.lib.platforms.unix;
   };
 }