anchor.diff:      owner = "vim";
       repo = "vim";
       rev = "v${version}";
  -    sha256 = "bb830fdbd268f319ee09107122b51e38998dfeb0715893cc478f7c0caf4989de";
  +    sha256 = "393ec55656042a9bdd2838c9070194f7f1e21caafd7cb99d39f5b114a724a447";
     };
   
     nativeBuildInputs = [
  
positive.code:   ];
  
    configureFlags = [
      "--enable-multibyte"
      "--enable-nls"
    ];
  
    postInstall = ''
  
negative.code:   inherit (stdenv.lib)
      optionalString;
  
    version = "8.1.0001";
  in
  stdenv.mkDerivation rec {
    name = "vim-${version}";
  