curator does not find ghc-x.y.z

[andreasabel]

curator: Can't get proper GHC version: The program 'ghc' version ==9.6.3 is required but the version found at /usr/local/bin/ghc is version 9.8.1

Would be great if curator would also look for ghc-9.6.3 (maybe even first!), not just for ghc.

[juhp]

I had a quick look - you are not wrong - however curator uses Cabal to determine the programDb and ghc/version in particular. So implementing this would be a little tedious.

How do you hit that error btw? - eg my /usr/bin/ghc is 9.4.5 but I can run some curator commands/scripts locally okay.

[juhp]

Or you can try running stack --resolver ghc-$GHCVER exec curator check-snapshot etc

[juhp]

Hmm, erm, okay I run into exactly this when I try upgrading nightly locally to 9.8.1 and run ./check 😢

Ah after running Fedora's stack-symlink-distro-ghc 9.8.1 [1] (equivalently stack setup 9.8.1) it works for me: so yeah I think the answer is basically stack.

[1] https://src.fedoraproject.org/rpms/haskell-platform/blob/rawhide/f/stack-symlink-distro-ghc

[andreasabel]

I run into exactly this

I would guess you ran into the symmetric case (curator wanting 9.8.1 and your system being on something lower...).

cabal has the --with-compiler option (short -w), but I do not know how deep this is implemented, whether it has some representation in Cabal-the-library.