stack install hfmt fails on Windows with latest stack (stylish-haskell must match ==0.9.*) about hfmt

[Musilitar]

+1

Having the exact same issue, and also don't understand the error message unfortunately.

[Ciantic]

@Musilitar I got these weird messages subsequently a lot with other packages too. Maybe it's Windows problem. The Haskell tooling is such a mess.

However that and others can be actually fixed with the suggestion in the message:

Add stylish-haskell-0.9.2.0@sha256:c43a964348b144c9dbe82391b27a9010a53405a8edf3db80abde0ca1d7117911 to extra-deps array in C:\sr\global-project\stack.yaml

[Musilitar]

@Ciantic

Thanks!
Yes I've been having some problems on Windows in general so I guess I'll switch to Linux again.
So this is probably not a problem of this package but just Stack on Windows.

[danstiner]

This is not a bug but a side effect of how stack works, since stylish-haskell and hindent are not in the stack snapshots so you'll have to manually add them to your stack.yaml as the build command suggested. I know that's annoying but unless someone maintains those packages in the stack snapshot I think that's just how it will be.

More info: https://docs.haskellstack.org/en/stable/stack_yaml_vs_cabal_package_file/

[danstiner]

To circle back on this, it isn't a linux vs Windows thing but just the way stack works with packages that are not part of the snapshot.

Things have gotten a bit better however, stylish-haskell is now part of stackage, so only hindent needs to be added manually.