mpv: allow scripts to add wrapper args

    # expected to have a `scriptName` passthru attribute that points to the

    # name of the script that would reside in the script's derivation's

    # `$out/share/mpv/scripts/`.

    # A script can optionally also provide an `extraWrapperArgs` passthru attribute.

    scripts ? [],

    extraUmpvWrapperArgs ? []

  }:

          # attribute of the script derivation from the `scripts`

          "--script=${script}/share/mpv/scripts/${script.scriptName}"

        ]

        # scripts can also set the `extraWrapperArgs` passthru

        ++ (script.extraWrapperArgs or [])

      ) scripts

    )) ++ extraMakeWrapperArgs)

    ;