Merge pull request #237594 from ncfavier/runCommand-position

      inherit buildCommand name;

      passAsFile = [ "buildCommand" ]

        ++ (derivationArgs.passAsFile or []);

      pos = let args = builtins.attrNames derivationArgs; in

        if builtins.length args > 0

        then builtins.unsafeGetAttrPos (builtins.head args) derivationArgs

        else null;

    }

    // (lib.optionalAttrs runLocal {

          preferLocalBuild = true;