Horizon Haskell Platform

horizon-haskell.net.

Horizon is a haskell package set targetting new builds of GHC.

Package Set Policy

This package set has the following policy.

• GHC will advance as often as possible
• Nonversioned locations (git, unversioned tarballs) are permitted to allow GHC to advance.
• The following packages must always build:
  • aeson
  • beam-postgres
  • composite-base
  • dhall
  • haskell-language-server
  • hedgehog
  • pandoc
  • persistent-postgresql
  • polysemy
  • servant
  • sydtest
  • tasty
  • xmonad-contrib
  • xmonad
  • wai-app-static
  • warp

Updating the package set

The package set is generated from the horizon.dhall using the following command:

nix run 'git+https://gitlab.horizon-haskell.net/haskell/horizon-gen-nix?ref=refs/tags/0.10.0'

If you need to do additional manual overrides to the nix code, such as addPkgconfigDepends, edit the configuration.nix overlay, which is applied afterwards.

Programmmatic Updates

To use horizon-shell.

nix run 'git+https://gitlab.horizon-haskell.net/shells/horizon-shell?ref=refs/tags/0.0.7'

See the in-shell help for usage.