anchor.diff:  
     hologram-nvim = buildVimPluginFrom2Nix {
       pname = "hologram-nvim";
  -    version = "2021-05-20";
  +    version = "2021-05-21";
       src = fetchFromGitHub {
         owner = "edluffy";
         repo = "hologram.nvim";
  -      rev = "7466e360040f14a828fe07cfa7fb6089d50f618e";
  -      sha256 = "1gjns7dkyzl8yj0vq3103r0f6wjk1fjryz7xa8gi67rchbrxrls4";
  +      rev = "593a458d04f7457669280373d98e41195c106d13";
  +      sha256 = "0diq42zdr9l8qw198c5y4jy5siab3cwh4ncsb5z111m28n6a6i5c";
       };
       meta.homepage = "https://github.com/edluffy/hologram.nvim/";
     };
  
positive.code: 
    nvim-lspconfig = buildVimPluginFrom2Nix {
      pname = "nvim-lspconfig";
      version = "2021-05-19";
      src = fetchFromGitHub {
        owner = "neovim";
        repo = "nvim-lspconfig";
        rev = "d23816b7b00028375e53dba2aa30f2b56573cf54";
        sha256 = "0m5fgjjks15vzqscgvl9m2di8clxizc8ky3lwlw9j8m4zy8jh8kw";
      };
      meta.homepage = "https://github.com/neovim/nvim-lspconfig/";
    };
  
negative.code:     src = fetchFromGitHub {
        owner = "ms-jpq";
        repo = "chadtree";
        rev = "6769987c13e313497e0fe98a59ccee0e70388927";
        sha256 = "1xaddhij0f652rx2k5iar8892ly84nslw8j74l7srfxs7l91kpyi";
      };
      meta.homepage = "https://github.com/ms-jpq/chadtree/";
    };
  