> Project Foo uses libqxt version 7. Project Bar uses libqxt version 8 Pretty much fixed by asdf or any sane manager.. Also, two containers aren't slow at all,

> Project Foo uses libqxt version 7. Project Bar uses libqxt version 8 Pretty much fixed by asdf or any sane manager.. Also, two containers aren't slow at all, but rebuilding one completely from scratch is. The latter is a good use case. No big deal to include a commit/version number, and a list of packages / libraries used in a lock file.. The problems with docker I have are: no lock files to pin versions. No integration with other package management tools. For example, I want to install my dependencies as a step in Docker. I don't want to manually copy over the list of dependencies from my lockfiles (gemfile, package, etc). The reason why I'd want this is that it speeds up builds.