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