Could not resolve host: github.com for SamSaffron/pups.git

[sam (Sam Saffron)]

This is very likely the solution

Failed to Bootstrap Ping is working to github

Edit /etc/default/docker and uncomment the following line: DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4" After this, restart docker and rebuild. I had the same issue today. The solution is taken from https://meta.discourse.org/t/afatal-unable-to-access-https-github-com-samsaffron-pups-git-could-not-resolve-host-github-com/18611/7?u=stefan