Origin: origin,
		List:   list,
	}
	if len(incompatible) == 0 || r.pathMajor != "" {
		// No +incompatible versions are possible, so no need to check them.
		return versions, nil
	}

	versionHasGoMod := func(v string) (bool, error) {
		_, err := r.code.ReadFile(ctx, v, "go.mod", codehost.MaxGoMod)
		if err == nil {
			return true, nil
		}
		if !os.IsNotExist(err) {
			return false, &module.ModuleError{