anchor.diff:  
     vim-ultest = buildVimPluginFrom2Nix {
       pname = "vim-ultest";
  -    version = "2021-09-26";
  +    version = "2021-10-05";
       src = fetchFromGitHub {
         owner = "rcarriga";
         repo = "vim-ultest";
  -      rev = "dfea06dc0e8da24338eef3414259055f360449cb";
  -      sha256 = "1h8g3pcwgjlm68rlzb0v9xwbgccklig68pd8i8g18bzw341b622b";
  +      rev = "7861d1925baef8fe3fa313affdfbdcaa6b2af26f";
  +      sha256 = "165klmixdch1nc9cxdldl5yg4q79q58riw0mg0mahqvvr5m1yrw3";
       };
       meta.homepage = "https://github.com/rcarriga/vim-ultest/";
     };
  
positive.code: 
    rust-tools-nvim = buildVimPluginFrom2Nix {
      pname = "rust-tools.nvim";
      version = "2021-10-01";
      src = fetchFromGitHub {
        owner = "simrat39";
        repo = "rust-tools.nvim";
        rev = "c2aacb9cd51907ec6cce65a683cb2df6ae78a227";
        sha256 = "067hjyw7d2wf443bny3m3gjkq3avf3k99xwzkl1yrd4vn321h2kn";
      };
      meta.homepage = "https://github.com/simrat39/rust-tools.nvim/";
    };
  
    rust-vim = buildVimPluginFrom2Nix {
      pname = "rust.vim";
      version = "2021-09-04";
      src = fetchFromGitHub {
        owner = "rust-lang";
        repo = "rust.vim";
        rev = "c06a17151c69b9d61e60a28274932a28fd37c453";
        sha256 = "11ms2has79w2jazvca2mysdbscs1412xmcql0mxc72wrpnws321h";
      };
      meta.homepage = "https://github.com/rust-lang/rust.vim/";
    };
  
negative.code: 
    auto-session = buildVimPluginFrom2Nix {
      pname = "auto-session";
      version = "2021-10-05";
      src = fetchFromGitHub {
        owner = "rmagatti";
        repo = "auto-session";
        rev = "dc7619fc3c6e3368ae449bf8ae1ad7630a720406";
        sha256 = "0izpxbwa144r9wjiy1m0r19hfwdlm2r3pggn178gj56ll7y2njnk";
      };
      meta.homepage = "https://github.com/rmagatti/auto-session/";
    };
  