*temp*.txt

        i3 = pkgs.stdenv.lib.overrideDerivation pkgs.i3 (oldAttrs: rec {
            src = pkgs.fetchgit {
                url = "http://github.com/Airblader/i3.git";
                rev = "03d3e7785fd9ce27a7f7ad36dcefc12a41672865";
                branchName = "gaps-next";
                sha256 = "81b2c65663c3ce13a7e62f233d5d902fe50dd0356b7a239807f30230c40670d5";
            };

            postUnpack = ''
                find .
                echo "Output: " + $src
                echo -n "4.10.2 (2015-07-14, branch \\\"gaps-next\\\")" > ./i3/I3_VERSION
                echo -n "4.10.2" > ./i3/VERSION
            '';
        });