`directory` and `unix` packages are broken with default config in LTS 24.10 (and probably other snapshots)

[TravisWhitaker]

LTS 24.10 includes unix version 2.8.6.0, whose cabal file contains these fragments:

flag os-string
  description: Use the new os-string package
  default: False
  manual: False

...

    if flag(os-string)
      build-depends: filepath >= 1.5.0.0, os-string >= 2.0.0
    else
      build-depends: filepath >= 1.4.100.0 && < 1.5.0.0

This means that unix cannot be built in its default configuration, because the version of filepath in LTS 24.10 is 1.5.4.0, and can only be built with the -fos-string flag enabled. This is potentially problematic for e.g. GHCJS and WASM.

[TravisWhitaker]

The directory package has the same issue.

[juhp]

Could you provide more information - is this a regression in 24.10?

unix works for ghc wasm and js ?

Though to be more specific, unix is provided by ghc not Stackage so to speak:
so you may need to report this to ghc upstream I think

[TravisWhitaker]

Though to be more specific, unix is provided by ghc not Stackage so to speak: so you may need to report this to ghc upstream I think

You are absolutely correct. I forgot that all three of unix, directory, and filepath are boot libraries. This is actually a problem with GHC 9.10.x and isn't Stackage's problem.

[ysangkok]

Note that GHC 9.10.3 has updated the unix version from 2.8.6.0 to 2.8.7.0 according to release notes. And this new version of GHC should become available in the LTS soon, though I am not sure when exactly. The unix changelog is here, and it does mention GHCJS explicitly: https://hackage.haskell.org/package/unix-2.8.7.0/changelog

[juhp]

lts-24.12 was released yesterday