anchor.diff:              hdiutil detach "$dev"
           fi
           diskutil erasevolume JHFS+ RAM $(hdiutil attach -nomount ram://10248576)
  +    }
  +
  +    ls() {
  +        ${pkgs.coreutils}/bin/ls --color=auto "$@"
       }
   
       install_name_tool() {
  
positive.code:     reexec-sandbox() {
          unset __NIX_DARWIN_SET_ENVIRONMENT_DONE
          unset __ETC_ZPROFILE_SOURCED __ETC_ZSHENV_SOURCED __ETC_ZSHRC_SOURCED
          exec IN_NIX_SANDBOX=1 /usr/bin/sandbox-exec -f /etc/nix/user-sandbox.sb exec $SHELL -l
      }
  
      no-sandbox() {
          tmux split-window -c '#{pane_current_path}' -p 25 $SHELL -l
          if [ $# -gt 0 ]; then
              tmux send-keys -t . "$*" Enter
          fi
  
negative.code:   environment.darwinConfig = "$HOME/.config/nixpkgs/darwin/configuration.nix";
  
    nix.nixPath =
      [{ # Use local nixpkgs checkout instead of channels.
        darwin-config = "$HOME/.config/nixpkgs/darwin/configuration.nix";
        darwin = "$HOME/.nix-defexpr/darwin"; }
      ];
  
    nixpkgs.config.allowUnfree = true;
  