anchor.diff:  
     packer-nvim = buildVimPluginFrom2Nix {
       pname = "packer-nvim";
  -    version = "2021-05-15";
  +    version = "2021-05-20";
       src = fetchFromGitHub {
         owner = "wbthomason";
         repo = "packer.nvim";
  -      rev = "af1a46466c5752b9d1953fb508d2544473f4821e";
  -      sha256 = "01nkgvqq9v1bc729pd10ghih60d42iap6ivm7n39419rh2df9qsv";
  +      rev = "b46aa481b9ab8ad9a152bda19b7f0cb3ffb0a85f";
  +      sha256 = "0czmv9gwv7xhmcc5dqi47dpgshavbxgqfg58dhrd10xnif7ci12s";
       };
       meta.homepage = "https://github.com/wbthomason/packer.nvim/";
     };
  
positive.code: 
    nvim-ts-rainbow = buildVimPluginFrom2Nix {
      pname = "nvim-ts-rainbow";
      version = "2021-05-17";
      src = fetchFromGitHub {
        owner = "p00f";
        repo = "nvim-ts-rainbow";
        rev = "5ef9c414cef1419b8576c62f1079b22315c72a04";
        sha256 = "1lxg9prli5zvy5f9ld83y1fjbm7y4ifkyvq16naxjr3grhp0lg76";
      };
      meta.homepage = "https://github.com/p00f/nvim-ts-rainbow/";
    };
  
    nvim-web-devicons = buildVimPluginFrom2Nix {
      pname = "nvim-web-devicons";
      version = "2021-04-16";
      src = fetchFromGitHub {
        owner = "kyazdani42";
        repo = "nvim-web-devicons";
        rev = "1db27380053de0cd4aaabd236a67c52d33199f1a";
        sha256 = "1qq9mk102jj5hqdkmrirccr3jkh2dgsfb3gy4wvpcp7mdcqapsqc";
      };
      meta.homepage = "https://github.com/kyazdani42/nvim-web-devicons/";
    };
  
negative.code: 
    diffview-nvim = buildVimPluginFrom2Nix {
      pname = "diffview-nvim";
      version = "2021-05-21";
      src = fetchFromGitHub {
        owner = "sindrets";
        repo = "diffview.nvim";
        rev = "991d633b162dd3dd03f50d1fde19366ab5943cb2";
        sha256 = "1n24ahzzbf66r6pjklca7ivydaxr8q03w4ib32bh8vmbk6b4x85g";
      };
      meta.homepage = "https://github.com/sindrets/diffview.nvim/";
    };
  