{ avr ? true, arm ? true, teensy ? true }: let overlay = self: super: let addDarwinSupport = pkg: pkg.overrideAttrs (oldAttrs: { meta.platforms = (oldAttrs.meta.platforms or []) ++ self.lib.platforms.darwin; }); in { dfu-programmer = addDarwinSupport super.dfu-programmer; teensy-loader-cli = addDarwinSupport super.teensy-loader-cli; avrgcc = super.avrgcc.overrideAttrs (oldAttrs: rec { name = "avr-gcc-8.1.0"; src = super.fetchurl { url = "mirror://gcc/releases/gcc-8.1.0/gcc-8.1.0.tar.xz"; sha256 = "0lxil8x0jjx7zbf90cy1rli650akaa6hpk8wk8s62vk2jbwnc60x"; }; }); }; nixpkgs = builtins.fetchTarball { url = "https://github.com/NixOS/nixpkgs/archive/0260747427737b980f0.tar.gz"; sha256 = "1p2yc6b40xvvxvmlqd9wb440pkrimnlc2wsbpa5rddlpx1dn8qmf"; }; pkgs = import nixpkgs { overlays = [ overlay ]; }; in with pkgs; let avr_incflags = [ "-isystem ${avrlibc}/avr/include" "-B${avrlibc}/avr/lib/avr5" "-L${avrlibc}/avr/lib/avr5" "-B${avrlibc}/avr/lib/avr35" "-L${avrlibc}/avr/lib/avr35" "-B${avrlibc}/avr/lib/avr51" "-L${avrlibc}/avr/lib/avr51" ]; in stdenv.mkDerivation { name = "qmk-firmware"; buildInputs = [ dfu-programmer dfu-util diffutils git python3 ] ++ lib.optional avr [ avrbinutils avrgcc avrlibc avrdude ] ++ lib.optional arm [ gcc-arm-embedded ] ++ lib.optional teensy [ teensy-loader-cli ]; AVR_CFLAGS = lib.optional avr avr_incflags; AVR_ASFLAGS = lib.optional avr avr_incflags; }