anchor.diff:  
     mattn-calendar-vim = buildVimPluginFrom2Nix {
       pname = "mattn-calendar-vim";
  -    version = "2021-09-06";
  +    version = "2021-09-13";
       src = fetchFromGitHub {
         owner = "mattn";
         repo = "calendar-vim";
  -      rev = "4cdf69c43d66500b1c1235f3c1c584f257115cb9";
  -      sha256 = "06phscsjqb3wnwdmb5w8rirj02fcz9svp5wdnzv9jkvj822ni4pr";
  +      rev = "6595a540a3fdf3d2a65ff18b3bf157540dc2602b";
  +      sha256 = "1186fbfhpb9n8cp79xbgq7q6a5sgndaldadrhshlq0nm3ajwv6v9";
       };
       meta.homepage = "https://github.com/mattn/calendar-vim/";
     };
  
positive.code: 
    vimtex = buildVimPluginFrom2Nix {
      pname = "vimtex";
      version = "2021-09-11";
      src = fetchFromGitHub {
        owner = "lervag";
        repo = "vimtex";
        rev = "c445c1684bd5cedc7adb2226f0e88292e1a988f0";
        sha256 = "0h9ks1v3qli5k1a85s5wg4lvv6pml7xgxynnmh1s6cv42b1hn6dy";
      };
      meta.homepage = "https://github.com/lervag/vimtex/";
    };
  
negative.code: 
    nord-vim = buildVimPluginFrom2Nix {
      pname = "nord-vim";
      version = "2021-09-12";
      src = fetchFromGitHub {
        owner = "arcticicestudio";
        repo = "nord-vim";
        rev = "c2aaac39e5cb6111dabd24be7098bf04947ca6ca";
        sha256 = "11iwjaypjkjd3s45dx3f7blpj0lkjs4jmp41sj7hlg2r7m64ss1g";
      };
      meta.homepage = "https://github.com/arcticicestudio/nord-vim/";
    };
  