/home (the rest)
/ (100GiB)
/swap (6GiB)
/boot (200MiB
there are vital basic operating system packages like the coreutils and binutils, then there's the "optional" like virtualbox or okular
thing is, I don't want these "optional" packages taking space in my root partition /
Since I consider them to be "user files" and not operating system files
is there a clear way of doing this without getting a million error messages about root sub-directories when installing anything??