anchor.diff:  
     src = fetchurl {
       url = "https://download.gluster.org/pub/gluster/glusterfs/${versionMajor}/${version}/${name}.tar.gz";
  -    sha256 = "ad07b7e887b33e10cd6293e9f7884fa0a07e7099ea96d23271d5a96afefd6d20";
  +    sha256 = "af3c666a7eca3f2d85bfa729cae38182e73d0abba48ee40b78be2f722aa0364e";
     };
   
     nativeBuildInputs = [
  
positive.code: }:
  
  let 
    versionMajor = "3.7";
    versionMinor = "11";
    version = "${versionMajor}.${versionMinor}";
  in
  stdenv.mkDerivation rec {
  
negative.code: { stdenv
  , automake
  , bison
  , fetchurl
  , flex
  