How to install juliaup systemwide for all users (linux)?

If I want to install julia systemwide, I just add it somewhere accessible and sysmink julia to /usr/bin/julia. This works perfectly because then each user will have its own ~/.julia folder, but if I want juliaup systemwide? The curl method described seems only for user installation…
EDIT: and, no, it doesn’t seems to “simply work”.. even if I chmod 777 the whole folder (!) I got the error that the julia launcher failed to figure out which juliaup channel to use…

Guess that this is not supported. See; Provide a guide for installing Julia via `juliaup` in a computer lab (so sysadmin installs juliaup and julia, regular users only run julia), or if this is not supported, a notice to that effect · Issue #1429 · JuliaLang/juliaup · GitHub