Then use a Docker container that has the right Python version already? There are official containers for that. If that's not good enough for you, you could do

Then use a Docker container that has the right Python version already? There are official containers for that. If that's not good enough for you, you could do some devops stuff and build a docker container in which you compile Python. I don't see where it is different from some npm project. You just need to use the available resources correctly.