self: super: 
 
 {
   fwoar = {
     gsed = super.callPackage ./prefixed-gnused {};

     sbcl_2_0_10 = super.callPackage ./sbcl.nix {
       version = "2.0.10";
       sha = "sha256:0mq5ga977hzsq4wgv31l8d6rpa186q8xc4x2awwcskf5nq842xai";
     };

   };
 }