a) tweak compilation flags of libraries & apps
b) describe full set of runtime config files of an app
and thus build a single full configuration of a whole system, like in NixOS.
Hm; or can this maybe somehow be solved with the "run scripts" mentioned at the end of the article? I'm even less than a noob with regards to Genode, so I'm not sure about that.
Or does the package manager only provide Nix-like functionality, with no way for NixOS-like features?