> The problem is that most Scala packages are built using sbt or mill, and > nothing you can do (to my knowledge) will make sbt or mill ignore maven and > use .deb installed libraries. > > Likewise with any scala-cli scripts. > > So unless you can solve the centralized cache problem and force all build > systems to use it you are not going to be able to do it your way.
sbt, scala-cli can be forced to ignore maven central and resolve everything from one local repository, offline with Dsbt.override.build.repos=true, and adding a repositories file e.g.: [repositories] debian: file:///usr/share/maven-repo What I can see from your point is the cost: each application still needs its whole dependency tree packaged at compatible versions, but still having the compiler and core libraries are a finite job and the foundation for the rest. I might be missing something though, let me know if you anything wrong. Juan
