anchor.diff:      fetchSubmodules = true;
     };
   
  +  # drop the following patches when upgrading to 1.16
  +  patches = [
  +    # fix build with modern clang https://github.com/micropython/micropython/pull/7254
  +    (fetchpatch {
  +      url = "https://github.com/micropython/micropython/commit/126b1c727118352923703719a2a3d45b9fad3c97.patch";
  +      sha256 = "13a2bmz24syhd1qsqbx39dcjkjdhf05ln7lanh816m94lkfib21j";
  +    })
  +    # fix build with modern clang https://github.com/micropython/micropython/pull/7254
  +    (fetchpatch {
  +      url = "https://github.com/micropython/micropython/commit/7ceccad4e2f1e9d073f5781c32e5b377e8391a25.patch";
  +      sha256 = "04mbxmb5yr6pbhhf9villq8km4wy579r46v9p4n0ysivrxij7i6f";
  +    })
  +    # fix build on aarch64-darwin https://github.com/micropython/micropython/pull/7393
  +    (fetchpatch {
  +      url = "https://github.com/micropython/micropython/commit/95048129b1d93854c25f501c02801929aeeb23f0.patch";
  +      sha256 = "1cngcwq4jviyhdnfcrrkdadfikhffzbj0d634j0344cp247jb41n";
  +    })
  +  ];
  +
     nativeBuildInputs = [ pkg-config python3 ];
   
     buildInputs = [ libffi readline ];
   
  +  buildPhase = ''
  +    runHook preBuild
  +    make -C mpy-cross
  +    make -C ports/unix
  +    runHook postBuild
  +  '';
  +
     doCheck = true;
   
  -  buildPhase = ''
  -    make -C mpy-cross
  -    make -C ports/unix
  -  '';
  +  skippedTests = ""
  +    + lib.optionalString (stdenv.isDarwin) " -e uasyncio_basic -e uasyncio_wait_task"
  +    + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) " -e ffi_callback"
  +    + lib.optionalString (stdenv.isLinux && stdenv.isAarch64) " -e float_parse"
  +  ;
   
     checkPhase = ''
  +    runHook preCheck
       pushd tests
  -    MICROPY_MICROPYTHON=../ports/unix/micropython ${python3.interpreter} ./run-tests.py
  +    ${python3.interpreter} ./run-tests.py ${skippedTests}
       popd
  +    runHook postCheck
     '';
   
     installPhase = ''
  
positive.code: { stdenv, lib, fetchFromGitHub, pkg-config, libffi, python3, readline }:
  
  stdenv.mkDerivation rec {
    pname = "micropython";
  
negative.code:   meta = with lib; {
      description = "A lean and efficient Python implementation for microcontrollers and constrained systems";
      homepage = "https://micropython.org";
      platforms = platforms.unix;
      license = licenses.mit;
      maintainers = with maintainers; [ sgo ];
    };
  