anchor.diff:  
     packer-nvim = buildVimPluginFrom2Nix {
       pname = "packer-nvim";
  -    version = "2021-07-16";
  +    version = "2021-07-17";
       src = fetchFromGitHub {
         owner = "wbthomason";
         repo = "packer.nvim";
  -      rev = "959d4bdce288eea7e112ec193d257c30b87d5d91";
  -      sha256 = "0h18hvkx8z4g8b4y81xbfhzzkjxfls154my8l3gv8v27i29b70a1";
  +      rev = "b6a904b341c56c5386bdd5c991439a834d061874";
  +      sha256 = "1ja6k5cw6v5nhi91s643r6c38a15rgi4n8cb0k5pc5q252q8km04";
       };
       meta.homepage = "https://github.com/wbthomason/packer.nvim/";
     };
  
positive.code:     src = fetchFromGitHub {
        owner = "neovim";
        repo = "nvim-lspconfig";
        rev = "8b4adace68ec09a44e2f64add8ae6dff4b2ba949";
        sha256 = "1mx49da4sq8i2glg5awblyv2dbyk56iabp3la2ajv55svgzi1q5x";
      };
      meta.homepage = "https://github.com/neovim/nvim-lspconfig/";
    };
  
negative.code: 
    rust-tools-nvim = buildVimPluginFrom2Nix {
      pname = "rust-tools-nvim";
      version = "2021-07-17";
      src = fetchFromGitHub {
        owner = "simrat39";
        repo = "rust-tools.nvim";
        rev = "a22eec84aaa5b31b5c708eed24a5c09f21ca46c0";
        sha256 = "14lwhdbpjrq2xyy9kfihjasvqg83bb13fl0r7aw95hngayx69l7k";
      };
      meta.homepage = "https://github.com/simrat39/rust-tools.nvim/";
    };
  