stdenv/check-meta: check config before checking meta outputs

  metaInvalid = meta: !metaType.verify meta;

  checkOutputsToInstall =

    if checkMeta then

    attrs:

    let

      actualOutputs = attrs.outputs or [ "out" ];

    in

      any (output: !elem output actualOutputs) (attrs.meta.outputsToInstall or [ ])

    else

      attrs: false;

    any (output: !elem output actualOutputs) (attrs.meta.outputsToInstall or [ ]);

  # Check if a derivation is valid, that is whether it passes checks for

  # e.g brokenness or license.

      }

    # --- Put checks that cannot be ignored here ---

    else if checkOutputsToInstall attrs then

    else if checkMeta && checkOutputsToInstall attrs then

      {

        reason = "broken-outputs";

        msg = "has invalid meta.outputsToInstall";