{ pkgs ? import <nixpkgs> {} }:
let
  esp = import (pkgs.fetchFromGitHub {
    owner = "xvuko";
    repo = "esp-nix";
    rev = "1a100e3dce4fd72532ef16d3ec60e7eb2d98387a";
    sha256 = "1yihw5p1n5s6l9zds9n566iai63zy3zhdlw70735fj504zdqjxv6";
  }) {inherit pkgs; };

in
pkgs.stdenvNoCC.mkDerivation {

  name = "spejsiot";
  phases = ["unpackPhase" "buildPhase" "installPhase"];
  src = ./.;

  ESP_HOME = esp.esp-open-sdk;
  SMING_RELEASE = "1";

  buildPhase = ''
    cp -r ${esp.sming} $NIX_BUILD_TOP/Sming
    chmod +w -R $NIX_BUILD_TOP/Sming
    export SMING_HOME=$(readlink -f $NIX_BUILD_TOP/Sming/Sming)

    cd base-firmware
    echo "const char * BUILD_ID=\"$out\";" > app/ver.c
    make
  '';

  buildInputs = [ pkgs.python3 ];

  installPhase = ''
    mkdir -p $out
    cp -r out/Esp8266/release/firmware $out/firmware
    mkdir -p $out/bin/
    ln -s ${esp.flash}/bin/flash $out/bin/flash
    #make flash V=1
  '';
}