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{
# This is a template created by `hix init`
inputs.haskellNix.url = "github:input-output-hk/haskell.nix";
inputs.nixpkgs.follows = "haskellNix/nixpkgs-unstable";
inputs.flake-utils.url = "github:numtide/flake-utils";
outputs = { self, nixpkgs, flake-utils, haskellNix }:
let
supportedSystems = [
"x86_64-linux"
"x86_64-darwin"
"aarch64-linux"
"aarch64-darwin"
];
in
flake-utils.lib.eachSystem supportedSystems (system:
let
overlays = [ haskellNix.overlay
(final: prev: {
hixProject =
final.haskell-nix.hix.project {
src = ./.;
evalSystem = "x86_64-linux";
};
})
];
pkgs = import nixpkgs { inherit system overlays; inherit (haskellNix) config; };
flake = pkgs.hixProject.flake {};
in flake // {
legacyPackages = pkgs;
formatter =
let
inherit (pkgs.hixProject.tools { fourmolu = "latest"; }) fourmolu;
in
pkgs.writeScriptBin "fourmolu-inline" ''
set -ex
${fourmolu}/bin/fourmolu -i `${pkgs.fd}/bin/fd -g *.hs src app`
'';
});
# --- Flake Local Nix Configuration ----------------------------
nixConfig = {
# This sets the flake to use the IOG nix cache.
# Nix should ask for permission before using it,
# but remove it here if you do not want it to.
extra-substituters = ["https://cache.iog.io"];
extra-trusted-public-keys = ["hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="];
allow-import-from-derivation = "true";
};
}