On Wednesday, 9 September 2020 at 12:13:32 UTC, kinke wrote: > On Wednesday, 9 September 2020 at 11:33:22 UTC, wjoe wrote: >> I suspect that maybe the compiler wasn't properly installed in >> the container ? > > Maybe just a typo in your Dockerfile? You're installing `g++9`, > but the package name is `g++-9`. Ahh good catch! It works now! Thanks :)