Nixpkgs: Package `stylish-haskell` is marked as broken, refusing to evaluate

[rpearce]

Describe the bug
Trying to install stylish-haskell fails.

https://github.com/NixOS/nixpkgs/blob/bf4169178ec8c9d8c9947ae4ee7f018093a6e77f/pkgs/development/haskell-modules/configuration-hackage2nix.yaml#L1022

To Reproduce
Steps to reproduce the behavior:

1. $ nix-env -i stylish-haskell
2. watch it fail

Expected behavior
It should install stylish-haskell

Screenshots

Additional context
stylish-haskell has a dependency on >=0.2.0 && <0.3, but it looks like HsYAML is set to 0.1.2.0 in configuration-hackage2nix.yaml

Metadata

λ nix-shell -p nix-info --run "nix-info -m"
these paths will be fetched (1.46 MiB download, 7.88 MiB unpacked):
  /nix/store/3lvcb4hxzax99zvb33ryk4whcv7zpjq2-bash-interactive-4.4-p23-info
  /nix/store/czg8zzd1qib1yafggnf5jsd14cmcfsdv-bash-interactive-4.4-p23-doc
  /nix/store/gr67mfj18zmyb0w7510ihi1qbivnjbaa-bash-interactive-4.4-p23-man
  /nix/store/kk512ydg1i1r0h5m9fizdrl9qxlrazrf-bash-interactive-4.4-p23-dev
  /nix/store/l5zsd7mphr5gp8p5y46ba6ahwlna1gnb-DarwinTools-1
  /nix/store/lq6lcv42lf7cp35lgxmxgs6qikqhvgg9-nix-info
  /nix/store/x3vwmx1y5l9ssy07i67395g1xzba1cyk-readline-7.0p5
  /nix/store/y27b4rnmiwzvpznb2hbqmvdzzk4a5472-bash-interactive-4.4-p23
copying path '/nix/store/czg8zzd1qib1yafggnf5jsd14cmcfsdv-bash-interactive-4.4-p23-doc' from 'https://cache.nixos.org'...
copying path '/nix/store/l5zsd7mphr5gp8p5y46ba6ahwlna1gnb-DarwinTools-1' from 'https://cache.nixos.org'...
copying path '/nix/store/3lvcb4hxzax99zvb33ryk4whcv7zpjq2-bash-interactive-4.4-p23-info' from 'https://cache.nixos.org'...
copying path '/nix/store/gr67mfj18zmyb0w7510ihi1qbivnjbaa-bash-interactive-4.4-p23-man' from 'https://cache.nixos.org'...
copying path '/nix/store/lq6lcv42lf7cp35lgxmxgs6qikqhvgg9-nix-info' from 'https://cache.nixos.org'...
copying path '/nix/store/x3vwmx1y5l9ssy07i67395g1xzba1cyk-readline-7.0p5' from 'https://cache.nixos.org'...
copying path '/nix/store/y27b4rnmiwzvpznb2hbqmvdzzk4a5472-bash-interactive-4.4-p23' from 'https://cache.nixos.org'...
copying path '/nix/store/kk512ydg1i1r0h5m9fizdrl9qxlrazrf-bash-interactive-4.4-p23-dev' from 'https://cache.nixos.org'...
 - system: `"x86_64-darwin"`
 - host os: `Darwin 19.3.0, macOS 10.15.3`
 - multi-user?: `no`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.3.1`
 - channels(rpearce): `"home-manager, nixpkgs-20.03pre211437.e3a9318b6fd"`
 - nixpkgs: `/Users/rpearce/.nix-defexpr/channels/nixpkgs`

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
  - stylish-haskell
# a list of nixos modules affected by the problem
module:

[cdepillabout]

Feel free to send a PR overriding the dependencies of stylish-haskell in configuration-common.nix.

Alternatively, getting stylish-haskell into Stackage would also help out here.

[rpearce]

@cdepillabout Thank you for the :eyes:! I'll see about both of these

[cdepillabout]

Also, I've written a couple places about how Haskell packages are updated in nixpkgs.

Maybe this thread will help you:

https://discourse.nixos.org/t/haskellpackages-stm-containers-fails-to-build/5416/4

[rpearce]

While the fix isn't available to me yet on the unstable channel, that fix looks good, so I'll close this to get it out of your hair!