} else {
				return nil, fmt.Errorf("%s: user-defined object without package: %s", posn, obj)
			}
		}
	}

	return pkg, nil
}

// pkgFilenames returns the list of package filenames for the given directory.
func pkgFilenames(dir string, includeTest bool) ([]string, error) {
	ctxt := build.Default
	ctxt.CgoEnabled = false
	pkg, err := ctxt.ImportDir(dir, 0)
	if err != nil {