trying to improve online docs rendering

1 job for master in 8 seconds (queued for 1 second)
Name Stage Failure
failed
pages Deploy
Reading state information...
E: Unable to locate package build_essential
E: Unable to locate package gcc
E: Unable to locate package cmake
E: Unable to locate package python3-pip
E: Unable to locate package python3
E: Unable to locate package python3-dev
Cleaning up file based variables
ERROR: Job failed: exit code 1