shell.nix

{ system ? builtins.currentSystem
, compiler ? "ghc863" # https://github.com/NixOS/nixpkgs/tree/master/pkgs/top-level/haskell-packages.nix
}:
let
  pkgs = import ./.nix/pinned-nixpkgs.nix {
    inherit system;
    config = {
      allowUnfree = true;
      packageOverrides = pkgs: rec {
        haskellPackages = pkgs.haskell.packages."${compiler}".override {
          overrides = self: super: with pkgs.haskell.lib; rec {
          };
        };
      };
    };
  };
  libical = pkgs.libical.overrideAttrs (old: {
    outputs = [
      "out"
      "dev"
    ];
    doInstallCheck = false;
    cmakeFlags = [
      "-DICAL_GLIB=False"
      "-DICAL_GLIB_VAPI=False"
      "-DICAL_BUILD_DOCS=False"
      "-DENABLE_GTK_DOC=False"
      "-DWITH_CXX_BINDINGS=False"
    ];
    nativeBuildInputs = with pkgs; [
      perl
      cmake
    ];
  });
in
(import ./release.nix {}).build.env.overrideAttrs (old: {
  buildInputs = (old.buildInputs or []) ++ [ libical.dev ];
})