[Haskell-beginners] How to change base version easily?

[Francesco Ariis]

Hello July,

Il 29 maggio 2020 alle 18:35 Treee July ha scritto:
> Hello,
> I installed the latest version of ghc, which caused one of my packages does
> not satisfy the constraint of the version. I just wondering if there exists
> a convenient way to degrade the version of the base. I use Arch Linux,
> which is not easy to install an elder version.

if you are using cabal, --allow-newer can ease some of the pain. Failing
that, -w will work — but you need to download and locally install the
appropriate ghc first.
Let us know if that’s enough