{
  description = "brain";
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

  outputs = inputs @ {
    self,
    nixpkgs,
  }: let
    inherit (nixpkgs.lib) genAttrs;
    forAllSystems = f:
      genAttrs
      ["x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin"]
      (system: f nixpkgs.legacyPackages.${system});
  in {
    devShells = forAllSystems (
      pkgs:
        with pkgs; {
          default = mkShell {
            buildInputs = [
              fontforge
              python3
              pre-commit
            ];
          };
        }
    );
  };
}