anchor.diff:  
     chadtree = buildVimPluginFrom2Nix {
       pname = "chadtree";
  -    version = "2021-09-12";
  +    version = "2021-09-13";
       src = fetchFromGitHub {
         owner = "ms-jpq";
         repo = "chadtree";
  -      rev = "121139c3308df99a230da75c3c168947dfd94f60";
  -      sha256 = "1w3fjz06cz43lyl52kcbyc9zsqzhs483jyc4av3fvycfqs9n2z6m";
  +      rev = "356863bbe896fbea6450b652c60a27b0a1cb3dbd";
  +      sha256 = "0s4vhw8qkg89a9afy9mqa42sl95dmapaqqhzz6gxvamqbk6kgj6y";
       };
       meta.homepage = "https://github.com/ms-jpq/chadtree/";
     };
  
positive.code: 
    neoformat = buildVimPluginFrom2Nix {
      pname = "neoformat";
      version = "2021-08-30";
      src = fetchFromGitHub {
        owner = "sbdchd";
        repo = "neoformat";
        rev = "3924dade3a0b06d1457958ea7aa181787478b464";
        sha256 = "1fr2lw5pfx9bs45c9knk9yz0p6pb5w51zlzqb5kr6c966hdq1msx";
      };
      meta.homepage = "https://github.com/sbdchd/neoformat/";
    };
  
negative.code: 
    mattn-calendar-vim = buildVimPluginFrom2Nix {
      pname = "mattn-calendar-vim";
      version = "2021-09-13";
      src = fetchFromGitHub {
        owner = "mattn";
        repo = "calendar-vim";
        rev = "6595a540a3fdf3d2a65ff18b3bf157540dc2602b";
        sha256 = "1186fbfhpb9n8cp79xbgq7q6a5sgndaldadrhshlq0nm3ajwv6v9";
      };
      meta.homepage = "https://github.com/mattn/calendar-vim/";
    };
  