Its easier to create package-managment tailored to our system, so we dont have to deal with bugs or failings of other devs. Just make it our own is easier to manage then being in a depency of a package-managment made for another system.

So build scripts are easy to write and easy to add to the git repo and git is alredy a good tool to fetch and update anything you need. The only thing we need is a database ( or a file that contains every file that is installed with full path; and another file that contains prog name and version or bla)

So it would be just a few easy to maintain textfiles and a parser that reads and execute the build file.