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Add cabal update to ghcup compile instructions in troubleshooting.md #2799

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Add cabal update to ghcup compile instructions in troubleshooting.md #2799

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4 changes: 2 additions & 2 deletions docs/troubleshooting.md
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Expand Up @@ -186,13 +186,13 @@ stack install haskell-language-server --stack-yaml=stack-${ghcVersion}.yaml
You also can leverage `ghcup compile hls`:

```bash
ghcup compile hls -v 1.6.1.0 --ghc 8.10.7
cabal update && ghcup compile hls -v 1.6.1.0 --ghc 8.10.7
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Can we maybe add a comment explaining this? Cabal update can take some time to run, and people don't have to execute it every time.

```

as it uses cabal underneath you might need to use a specific cabal.project for some ghc versions:

```bash
ghcup compile hls -v 1.6.1.0 --ghc 9.0.2 --cabal-project cabal-ghc90.project
cabal update && ghcup compile hls -v 1.6.1.0 --ghc 9.0.2 --cabal-project cabal-ghc90.project
```

### Preprocessors
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