anchor.diff:        "")
           ;;
         *)
  -        echo "[1;31merror: The ~/.nix-defexpr/channels symlink does not point your users channels[0m" >&2
  +        echo "[1;31merror: The ~/.nix-defexpr/channels symlink does not point your users channels, aborting activation[0m" >&2
           echo "Running nix-channel will regenerate it" >&2
           echo >&2
           echo "    rm ~/.nix-defexpr/channels" >&2
  
positive.code:       echo >&2
        echo "$darwinChanges" >&2
        echo >&2
      fi
    '';
  
  
negative.code: 
      system.activationScripts.checks.text = ''
        ${darwinChanges}
        ${runLink}
        ${buildUsers}
        ${nixChannels}
        ${nixInstaller}
  