Fix CXX flags

2 jobs for !1 with nkupdates in 3 minutes and 9 seconds (queued for 6 seconds)
detached
Status Name Job ID Coverage
  Build
failed build_job #3394

00:03:09

 
  Test
skipped test_job #3395
 
Name Stage Failure
failed
build_job Build
Done in 152.93s.
# Backend
go install -v ./pkg/
go: could not create module cache: mkdir /home/makepkguser/go: permission denied
make: *** [Makefile:8: install] Error 1
==> ERROR: A failure occurred in build().
Aborting...
Cleaning up file based variables
ERROR: Job failed: exit code 1