anchor.diff:  
     syntastic = buildVimPluginFrom2Nix {
       pname = "syntastic";
  -    version = "2019-01-30";
  +    version = "2019-03-07";
       src = fetchFromGitHub {
         owner = "scrooloose";
         repo = "syntastic";
  -      rev = "7274363a7267bf168ec21a50375102d602fd1232";
  -      sha256 = "0x6jn1hqxjlhhsykqqrlx910x53xcrwd3qa1jx0a9yighws9b01i";
  +      rev = "1089ee5212b833d73c96ca93773b9eca1a0f721b";
  +      sha256 = "084hm6ash2sgxpa3mgbd919yb775mzdalblnhv4iqc59zlafh78q";
       };
     };
   
  
positive.code: 
    context_filetype-vim = buildVimPluginFrom2Nix {
      pname = "context_filetype-vim";
      version = "2018-08-30";
      src = fetchFromGitHub {
        owner = "Shougo";
        repo = "context_filetype.vim";
        rev = "5392e3f0f3ff82b7149818a5700680f4bbcfea45";
        sha256 = "0xnqn96qnlvpvqc4sx8vmnryfqgcxrgczlmadgkms18gd3ib6i0z";
      };
    };
  
  
negative.code: 
    fzf-vim = buildVimPluginFrom2Nix {
      pname = "fzf-vim";
      version = "2019-02-22";
      src = fetchFromGitHub {
        owner = "junegunn";
        repo = "fzf.vim";
        rev = "b31512e2a2d062ee4b6eb38864594c83f1ad2c2f";
        sha256 = "18wqg6czxwbbydssq6azqcl4llb5lf4phivdas4nqnlgg9hnp5ga";
      };
    };
  
  