dial tcp: lookup proxy.golang.org [..] connection refused

HI! I'm trying to build a Go package on https://build.opensuse.org and it seems the Go modules are downloaded via proxy.golang.org. Some packages seem to download just fine but one fails: dial tcp: lookup proxy.golang.org on [::1]:53: read udp [::1]:58763->[::1]:53: read: connection refused I guess the DNS resolver trys to switch to TCP but this gets blocked. Never built a Go package before so I'm not sure whether it's correct [1]. Ciao, Michael. [1] https://build.opensuse.org/package/show/home:stroeder:network/galene