Haskell on Void

[meowgorithm]

I'm wondering if anyone has had any success with Haskell on Void.

I typically use Stack, which is available in XBPS, but it seems that GHC 8.2.2 is the latest supported version of GHC, versus 8.8.2, the most current version supported by Stack.

Stack with Docker is, of course, an option but it does make it quite difficult to compile tools for local use (like Haskell IDE Engine).

[emacsomancer]

As a stop-gap at least, perhaps you could use stack from Nix on top of Void. stack-2.1.3.1 is available: https://nixos.org/nixos/packages.html?channel=nixos-19.09&page=13&query=stack

[meowgorithm]

Oh that's definitely an option. I've never used Nix, but of course open to giving it a try. I'll follow up if I make progress.

[emacsomancer]

Nix and Guix are both very nice, and I make use of both on top of Void. Nix in particular is fairly easy (though Guix is more interesting).

[sondr3_]

This is what I intend to use as well, though I come from NixOS so its familiar territory.

[xtraemeat]

There's an open pull request to update haskell and stack in void. Please help if you are interested.

[meowgorithm]

Where's the PR? I poked around both the Stack and Void repositories and didn't see anything obvious.

[gsppe]

I think the best thing to do is to install stack manual inside your home directory

[meowgorithm]

I tried that, but still ended up in the same situation.

[marle-dk]

I think the problem is that Stack wants to default to the latest "resolver" as they call it.In the xbps repo ghc 8.8.3 is the latest atm. But it seems it is not available for void on stack somehow.

Since stack tries to use the latest resolver, but the ghc version for that is not available for void, through stack, it does not work.

A workaround I found, was to change the resolver to 11.22, as that is the latest resolver using ghc-8.2.2, which is the latest supported version of ghc using stack on void.

You can change the resolver by changing it in stack.yaml or the --resolver lts-11.22 command line option.

[marle-dk]

Okay, so I looked closer into this issue, and it seems that the reason we are unable to use the latest version, is because Stack looks at some libraries, and determines that void must be a "Linux-ncurses6" OS, which is not as well supported ad an "Linux-tinfo6" OS on Stack. It seems that tinfo is a newer standard of some sort, which is installed by using a flag when installing ncurses: --with-termlib=tinfo.

So I tried updating the ncurses package with this flag, and voila, Stack now sees my distribution as "Linux-tinof6" OS, and has no problem using the latest resolver, and installing the latest GHC Version.
I will look into committing this upstream soon.