https://proxy.golang.org/github.com/ferranbt/nomad/@v/v0.9.3-0.20190607002617-85c449b7667c.zip: https://proxy.golang.org/github.com/ferranbt/nomad/@v/v0.9.3-0.20190607002617-85c449b7667c.zip: 503 Service Unavailable