nix/overlay.nix


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{ nix-filter, ... }:
final: prev: let
  src = nix-filter {
    root = ../.;
    include = [
      ../app
      ../src
      ../package.yaml
      ../www-assets.cabal
    ];
  };
in {
  fontawesome = prev.callPackage ./fontawesome.nix {};

  haskellPackages = prev.haskellPackages.extend (hfinal: hprev: {
    www-assets = hfinal.callCabal2nix "www-assets" src {};
  });

  www-assets = prev.callPackage ./build.nix {
    buildAssets = final.haskell.lib.compose.justStaticExecutables final.haskellPackages.www-assets;
    inherit (final) fontawesome;
  };

}