anchor.diff:  
     nvim-treesitter = buildVimPluginFrom2Nix {
       pname = "nvim-treesitter";
  -    version = "2021-07-14";
  +    version = "2021-07-18";
       src = fetchFromGitHub {
         owner = "nvim-treesitter";
         repo = "nvim-treesitter";
  -      rev = "d779ee79f0426711f84b770bf6ff4afda4f41c1e";
  -      sha256 = "0svnb4fsqsjhlqcikq0kgrwyrqfqplgvx93mhw1qhpmwfbgqn6vi";
  +      rev = "9144ea1107ed5aaf250bffafc1f0f32fb97cce47";
  +      sha256 = "05apxyy0xg6llskigirglb4a73ay8cdaw2rckl2g3d6j8ry9dkc4";
       };
       meta.homepage = "https://github.com/nvim-treesitter/nvim-treesitter/";
     };
  
positive.code: 
    vim-fugitive = buildVimPluginFrom2Nix {
      pname = "vim-fugitive";
      version = "2021-07-16";
      src = fetchFromGitHub {
        owner = "tpope";
        repo = "vim-fugitive";
        rev = "58516a13c623e6b21be6fed1f6067eed67005949";
        sha256 = "0gzdsp1gz1wpw8z47v3sr9b0ma41qnz0r4iiq0jr84srr3817zpl";
      };
      meta.homepage = "https://github.com/tpope/vim-fugitive/";
    };
  
negative.code: 
    vim-ultest = buildVimPluginFrom2Nix {
      pname = "vim-ultest";
      version = "2021-07-18";
      src = fetchFromGitHub {
        owner = "rcarriga";
        repo = "vim-ultest";
        rev = "06f965a62c32906f220c37e7b758a275d6a992f6";
        sha256 = "0zgpp6g29n1kb0qi6n84i1d540g0xhw5bzj8kp5xsh5wlvn9h4fk";
      };
      meta.homepage = "https://github.com/rcarriga/vim-ultest/";
    };
  