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. Thanks, July
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
Using haskell packages provided by ArchLinux is a pain (cf https://wiki.archlinux.org/index.php/Haskell). You have to tweak ~/.cabal/config, etc. I would recommend using `stack` as it manages ghc installations itself. You could also use ghcup+cabal-install. Cheers, Sylvain On 29/05/2020 12:56, Francesco Ariis wrote:
Hello July,
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
Il 29 maggio 2020 alle 18:35 Treee July ha scritto: that, -w will work — but you need to download and locally install the appropriate ghc first. Let us know if that’s enough _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
participants (3)
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Francesco Ariis -
Sylvain Henry -
Treee July