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OK, I keep getting HLS errors even though cabal builds fine. Environment: OS: Windows 10 Pro GHC: 9.6.7 Cabal: 3.12.1.0 I'm on Windows 10 Pro Education, using GHC 9.6.7, and cabal 3.12.1.0 I'm ...
david-hoze's user avatar
  • 1,085
0 votes
1 answer
150 views

I'm using HLS from terminal with the command haskell-language-server-9.12.2. I'm getting the following error: Step 4/4: Type checking the files 2025-12-15T23:04:57.109846Z | Info | Cradle path: app/...
Yago's user avatar
  • 493
2 votes
1 answer
155 views

I'm trying to setup the Neovim plugin https://github.com/mrcjkb/haskell-tools.nvim for a while now and I don't see any progress. I mostly want this plugin for Haskell CodeLenses, so that I can write a ...
h-c's user avatar
  • 54
1 vote
1 answer
83 views

I am using the Visual Studio Code Haskell extension. The Haskell Language Server (hls) docs state that it has a feature that: Evaluates a Template Haskell splice and inserts the resulting code in its ...
Ashok Kimmel's user avatar
  • 381
2 votes
0 answers
158 views

I'm trying out the haskell-halogen framework that compiles to javascript via GHC's JS backend. I'm able to compile the sample project from the library author with the following config: GHCup 0.1.40.0 ...
Newton Migosi's user avatar
  • 23
0 votes
0 answers
58 views

The project is built with stack. HLS works well on the tests after running stack build. But if I run stack build --test, hls fails on the test modules: ghcide compiled with GHC 8.10 failed to load ...
luntain's user avatar
  • 4,760
-2 votes
1 answer
229 views

So, i was trying to use the package in the title, but its not working by nothing. I did how they said to do in the github link, but didnt work. Ive try to use a config exacly as a friend which get to ...
JJoaoll's user avatar
  • 9
4 votes
1 answer
376 views

I have a project set up in VS-code with the HLS extenion. For functions that are imported I can hoover over it or click "Peek" in order to see it's type. But when I click "Go to ...
Kvothe's user avatar
  • 305
1 vote
1 answer
263 views

Why it highlights Data.MultiSet? package.yaml: name: anagram version: 1.4.0.8 dependencies: - base - multiset - text - containers library: exposed-modules: Anagram source-dirs: src ghc-...
Alexander Myltsev's user avatar
  • 499
1 vote
0 answers
79 views

When using an older nixpkgs (2022), one can do the following to customize pkgs.haskellPackages.haskell-language-server to, for example, disable ormolu and fourmolu features: with pkgs.haskell.lib....
Sridhar Ratnakumar's user avatar
  • 86.6k
0 votes
1 answer
163 views

When I try to execute any kind of code actions from eglot connected to hls within emacs, I have to accept by hand the execution of the code action in the following popup: I find this behaviour to be ...
MrO's user avatar
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0 votes
1 answer
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I am using LunarVim in a Nix environment to program Haskell. The environment has a haskell-language-server of its own, which starts promptly when I open a file by LunarVim. The problem is that after ...
MechWright's user avatar
  • 33
2 votes
0 answers
383 views

I had a working Haskell Language Server/VS Code integration, and it just stopped working, and now even a fresh install of VS Code, Haskell (via GHCup), the HLS and a fresh project, I get the error ...
David Roberts's user avatar
  • 121
2 votes
1 answer
238 views

I have a Haskell project on Windows. The project depends on diagrams-cairo, which depends on GTK+. I have successfully built this project (via msys64+MINGW) and it runs nicely. The problem is how to ...
chansey's user avatar
  • 1,429
0 votes
1 answer
183 views

I was looking for how to discover the names of the methods of a type class in a Haskell file using the HLS. Searching around I found this page where the code action "Add missing class methods&...
Enlico's user avatar
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