anchor.diff:  
     context_filetype-vim = buildVimPluginFrom2Nix {
       pname = "context_filetype-vim";
  -    version = "2021-03-04";
  +    version = "2021-05-11";
       src = fetchFromGitHub {
         owner = "Shougo";
         repo = "context_filetype.vim";
  -      rev = "f5e4ed8f7847cd5474017459c2a0f2dfd2bf971c";
  -      sha256 = "039mnsd6k0sgs8l1a8ngl3y817c8g657nv8v9bdw9h8l5a934cb2";
  +      rev = "39a552866c83946127f244912b6d408525f03364";
  +      sha256 = "0m2w4f3bn8miplxb9q76fcipdkc9lbfyp47193q57s555b1g0x0k";
       };
       meta.homepage = "https://github.com/Shougo/context_filetype.vim/";
     };
  
positive.code: 
    vim-matchup = buildVimPluginFrom2Nix {
      pname = "vim-matchup";
      version = "2021-05-09";
      src = fetchFromGitHub {
        owner = "andymass";
        repo = "vim-matchup";
        rev = "2032562ba91b9904fdbaac8a586d93fc69d5aec6";
        sha256 = "1d38dx5s89113iglbji3q4va3hnjqa6cx141faldp283v39y2qv2";
      };
      meta.homepage = "https://github.com/andymass/vim-matchup/";
    };
  
negative.code: 
    chadtree = buildVimPluginFrom2Nix {
      pname = "chadtree";
      version = "2021-05-11";
      src = fetchFromGitHub {
        owner = "ms-jpq";
        repo = "chadtree";
        rev = "2ccce5fa035176b51fa628ba6c672dedf78813e8";
        sha256 = "0nrxxwf4wy6g5222qf4bjbyai8gym1k0b4wdyjpldfk5pdxd81zg";
      };
      meta.homepage = "https://github.com/ms-jpq/chadtree/";
    };
  