if dot || len(pathMajor) <= 2 || pathMajor[2] == '0' || pathMajor == "/v1" {
		return path, "", false
	}
	return prefix, pathMajor, true
}

// splitGopkgIn is like SplitPathVersion but only for gopkg.in paths.
func splitGopkgIn(path string) (prefix, pathMajor string, ok bool) {
	if !strings.HasPrefix(path, "gopkg.in/") {
		return path, "", false
	}
	i := len(path)