After setting up the toolchain and the esp-idf, I built the micropython firmware and flashed it on my esp32:

make -C mpy-cross
cd esp32
rm -rf build/
make
make erase
make deploy

I can connect to it and besides a OSError: [Errno 2] ENOENT everything seems to work fine. But when I import network, I get this error:

>>> import network
E (174028) wifi: invalid magic number 3ffcf140, call WIFI_INIT_CONFIG_DEFAULT to init config
E (174028) wifi: wifi_init 1361 ret=258
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: Wifi Invalid Argument

Recompiling and reflashing the firmware did not fix this issue. Has anyone experienced something similar or am I the only one?

build log

Chip: (probably fake) NodeMCU ESP32-S (ESP-WROOM-32 Revision 1)

Edit 1: I tried ESP-IDF 4ec2abbf23084ac060679e4136fa222a2d0ab0e8 and 4029ed1df4097f9eca8759e6e5ac0b72135b089d - still got the same problem

Edit 2: I tried all micropython-esp32 versions down to 06168c92c821b526014afb84b0e83199a52a8424 - same issue