anchor.diff:   src = fetchgit {
      url = "https://github.com/stumpwm/stumpwm";
      rev = "refs/tags/${tag}";
  -   sha256 = "0a0lwwlly4hlmb30bk6dmi6bsdsy37g4crvv1z24gixippyv1qzm";
  +   sha256 = "05fkng2wlmhy3kb9zhrrv9zpa16g2p91p5y0wvmwkppy04cw04ps";
    };
   
    buildInputs = [ texinfo4 autoconf lispPackages.clx lispPackages.cl-ppcre sbcl makeWrapper stumpwmContrib ];
  
positive.code:     maintainers = with maintainers; [ _1126 ];
      platforms   = platforms.linux;
    };
  }
negative.code: { stdenv, pkgs, fetchgit, autoconf, sbcl, lispPackages, xdpyinfo, texinfo4, makeWrapper, stumpwmContrib }:
  
  let
    tag = "0.9.9";
  in
  
  stdenv.mkDerivation rec {
  