wiringPi cross compile

build script and output

$ nix-build --keep-failed --expr 'let pkgs = import <nixpkgs> { localSystem = { system = "x86_64-linux"; }; crossSystem = { system = "armv7l-linux"; }; }; in pkgs.callPackage ./dht11reader/wiringPi { }'
these derivations will be built:
  /nix/store/3kazdq4yfy04assx9vi367aza5xn0bfs-wiringPi-armv7l-unknown-linux-gnueabihf.drv
building '/nix/store/3kazdq4yfy04assx9vi367aza5xn0bfs-wiringPi-armv7l-unknown-linux-gnueabihf.drv'...
unpacking sources
unpacking source archive /nix/store/jrv8znqnippqs5bnd9557n126x4dnpgd-source
/nix/store/7k43g2ix6s9dhnccv975iq802f0bis18-stdenv-linux/setup: line 794: /nix/store/9rsxnjbzxhrg1ij8knlxzffpgh0vglc0-coreutils-8.29-armv7l-unknown-linux-gnueabihf/bin/basename: cannot execute binary file: Exec format error
/nix/store/7k43g2ix6s9dhnccv975iq802f0bis18-stdenv-linux/setup: line 812: /nix/store/9rsxnjbzxhrg1ij8knlxzffpgh0vglc0-coreutils-8.29-armv7l-unknown-linux-gnueabihf/bin/cp: cannot execute binary file: Exec format error
do not know how to unpack source archive /nix/store/jrv8znqnippqs5bnd9557n126x4dnpgd-source
note: keeping build directory '/tmp/nix-build-wiringPi-armv7l-unknown-linux-gnueabihf.drv-12'
builder for '/nix/store/3kazdq4yfy04assx9vi367aza5xn0bfs-wiringPi-armv7l-unknown-linux-gnueabihf.drv' failed with exit code 1
error: build of '/nix/store/3kazdq4yfy04assx9vi367aza5xn0bfs-wiringPi-armv7l-unknown-linux-gnueabihf.drv' failed
$

wiringPi.nix

{ pkgs, mkDerivation, fetchFromGitHub, ... }:
mkDerivation rec {
  name = "wiringPi";
  version = "2.46";
  src = fetchFromGitHub {
    owner = "WiringPi";
    repo = "WiringPi";
    rev = "093e0a17a40e064260c1f3233b1ccdf7e4c66690";
    sha256 = "137fnav3yzr2w0sm0c2k2g1fzdgvj77dkxgn61nsg32jw3b3z7gj";
  };
  buildInputs = [ ];
  nativeBuildInputs = [ pkgs.gcc ];

  patchPhase = ''
    sed -i -e 's,-I$(DESTDIR)$(PREFIX)/include,-I../wiringPi -I../devLib,' gpio/Makefile
    sed -i -e 's,-L$(DESTDIR)$(PREFIX)/lib,-L../wiringPi -L../devLib,' gpio/Makefile

    sed -i -e 's,-I\.,-I. -I../wiringPi,' devLib/Makefile
  '';

  buildPhase = ''
    (pushd wiringPi; make libwiringPi.so.${version} && mv libwiringPi.so.${version} libwiringPi.so; popd) &&
    (pushd devLib; make libwiringPiDev.so.${version} && mv libwiringPiDev.so.${version} libwiringPiDev.so; popd) &&
    (pushd gpio; make; popd)
  '';

  installPhase = ''
    mkdir -p $out/lib
    mv wiringPi/libwiringPi.so $out/lib/

    mkdir -p $out/include
    mv wiringPi/wiringPi.h $out/include/
  '';
}