anchor.diff:      src = fetchgit {
         url = "git://github.com/MarcWeber/vim-addon-completion";
         rev = "021c449a5ce1ce4ac0af5955e05b0279c1cc0e75";
  -      sha256 = "1sm00gs0h96kh7h64gjkyniw07495vqylh157m2f9xzd953lg6ln";
  +      sha256 = "1ld059y2qwlc5bdfjm2p314s1qh31lxs54g944pw49r46s5nlslr";
       };
       dependencies = ["tlib"];
   
  
positive.code:     src = fetchgit {
        url = "git://github.com/shougo/vimproc.vim";
        rev = "0ff17bc0725cd0323df87664fa02b1436349f667";
        sha256 = "0r5kfj1zl9hld9rx5jdvgmdr30d573ncikily0qcjl90y4rjw3fp";
      };
      dependencies = [];
      buildInputs = [ which ];
  
negative.code:     src = fetchgit {
        url = "git://github.com/tpope/vim-eunuch";
        rev = "5ee2b82b565e6c6d80f1cb7735c78f66a159b198";
        sha256 = "108v98qy49w2pgzndmqc9nydmsql2bnbcc849wshvkxgca349ixc";
      };
      dependencies = [];
  
  