diff --git a/pkgs/development/interpreters/ruby/ruby-19.nix b/pkgs/development/interpreters/ruby/ruby-19.nix
index 82e45a01c165..5e406509a8cf 100644
--- a/pkgs/development/interpreters/ruby/ruby-19.nix
+++ b/pkgs/development/interpreters/ruby/ruby-19.nix
@@ -42,6 +42,7 @@ stdenv.mkDerivation rec {
     license = "Ruby";
     homepage = "http://www.ruby-lang.org/en/";
     description = "The Ruby language";
+    platforms = stdenv.lib.platforms.all;
   };
 
   passthru = rec {