How can I browse output of any random command in quickfix window?

I'd like to run some $RANDOM_COMMAND, and have the results opened in ("piped to") the quickfix window (:copen/:cfile). Is this possible, without having to define some commands in vimrc? (Hopefully in some "simple way", i.e. I'd like to be able to memorize this so I can run this on any new random box with vanilla vim that I'll have to login to.)

edit: initially didn't know how to express "simple way" more precisely, but now I know at least partially: I'd much prefer an answer of 1, max 2 lines.

edit2: tried something like below ^{(from this and this)}:

:call setqflist(split(system('RANDOM_COMMAND'), '\n'))
:copen

but didn't seem to work anyway :/ (and mucho ugly too)