gistfile1.txt

 trace' = x: builtins.trace x x;
 sbtix = import
            (pkgs.fetchgit (trace' 
                (removeAttrs
                    (builtins.fromJSON
                        (builtins.readFile ./jsons/sbtix.json)
                    )
                    [ "date" "fetchSubmodules" ]
                )
            ));