anchor.diff:  
       git = {
         enable = true;
  -      userName  = "Hongchang Wu";
  +      userName = "Hongchang Wu";
         userEmail = "wuhc85@gmail.com";
         extraConfig = import ./git/config.nix;
         ignores = [ "*~" "*.swp" "\\#*\\#" ".\\#*" "*.bak" "*.tmp" "nohup.out" ".vscode/" ];
  
positive.code:       bzip2
        coreutils
        curl
        fontconfig
        git-lfs
        gitAndTools.gh
  
negative.code:       go
        hanazono
        htop
        jq
        locale
        niv
        nix-prefetch-scripts
        nixfmt
        nodejs
  