curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh...System requirements Note: On OS X, in the course of running ghcup you will be given a dialog box to install the command line tools. Accept and the requirements will be installed for you. You will then need to run the command again.Press ENTER to proceed or ctrl-c to abort.Installation may take a while.[ Info ] verifying digest of: ghc-8.8.4-x86_64-apple-darwin.tar.xz[ Info ] Unpacking: ghc-8.8.4-x86_64-apple-darwin.tar.xz to /var/folders/df/5d_dsdrx1dn4j30ktsgn8blh0000gp/T/ghcup-gQKzcj ^C ^C
The bootstrap script from https://www.haskell.org/platform/ doesn't install the latest, but the recommended GHC version. With the latest GHC version there can still be a number of packages that don't build. recommended is bumped at our own discretion.
I think the page should explain the above. You shouldn't have to start installing the recommended version to find out what version you are going to get.
We only know the recommended version once we have downloaded the ghcup binary where. There's no sensible way to show this information earlier without duplicating that info (and then risking it going out of sync).