Haskell Horizon Platform
Horizon is a haskell package set targetting new builds of GHC.
Updating the package set
The package set is generated from the manifest.dhall using the following command:
nix run .#horizon-gen-nix
This will generate both the pkgs folder and the overlay.nix. If you want to
regenerate a particular package in pkgs, delete that file from pkgs. To
regenerate the entire package set from scratch, delete the pkgs folder.
If you need to do additional manual overrides to the nix code, such as
addPkgconfigDepends, edit the configuration.nix overlay, which is applied
after overlay.nix.