During the 'go mod verify' command, 'go' tries to download dependencies, which is impossible due to the network sandbox. Reproducible: Always Steps to Reproduce: 1. Try to install net-mail/hydroxide 2. Fails during src_unpack Actual Results: go: github.com/ProtonMail/go-crypto@v1.0.0: Get "https://proxy.golang.org/github.com/%21proton%21mail/go-crypto/@v/v1.0.0.mod": dial tcp: lookup proxy.golang.org on [2001:1620:a84:0:ba27:ebff:fe1e:c09b]:53: dial udp [2001:1620:a84:0:ba27:ebff:fe1e:c09b]:53: connect: network is unreachable