anchor.diff:  
     vim-clap = buildVimPluginFrom2Nix {
       pname = "vim-clap";
  -    version = "2020-12-16";
  +    version = "2021-01-01";
       src = fetchFromGitHub {
         owner = "liuchengxu";
         repo = "vim-clap";
  -      rev = "af939a85cc78c9974dcf202a95ff8793755d575d";
  -      sha256 = "1kcnj0jqbag62gvxrr54hmri5qpskfs0i0l2m8z4ffliixy0mkan";
  +      rev = "b9ca65dbcc89dfb2702fb2ab0e98c7119f4e6bbf";
  +      sha256 = "0j9xh0yf224fsnm9ksml9m8jfx4m9iji0a6h8q0mk8zglvh6qksc";
       };
       meta.homepage = "https://github.com/liuchengxu/vim-clap/";
     };
  
positive.code: 
    Spacegray-vim = buildVimPluginFrom2Nix {
      pname = "Spacegray-vim";
      version = "2020-12-23";
      src = fetchFromGitHub {
        owner = "ackyshake";
        repo = "Spacegray.vim";
        rev = "37203c8514d244532a8b17ee2be271c51ca3a7d9";
        sha256 = "1xf0apbdmw0f9v6rz6n363y9fafss33wsk7y5r33ssgbhw2spm9r";
      };
      meta.homepage = "https://github.com/ackyshake/Spacegray.vim/";
    };
  
negative.code: 
    vim-polyglot = buildVimPluginFrom2Nix {
      pname = "vim-polyglot";
      version = "2021-01-01";
      src = fetchFromGitHub {
        owner = "sheerun";
        repo = "vim-polyglot";
        rev = "05b8bbc938bdeac4a5ee2d3ae5cf7a7f05e822d3";
        sha256 = "0l7f80gas6rmiw5m0varsyv3sk3sfkqx0z05hlh4719a304b16pv";
      };
      meta.homepage = "https://github.com/sheerun/vim-polyglot/";
    };
  