[19.07] Some Python packages are not built due to ValueError: not enough values to unpack #12680
Description
Maintainers: @jefferyto , @commodo
Env: all
After update of Python3 in OpenWrt 19.07 some packages like zipp, cryptography, dateutil fails with the following error:
File "/builder/shared-workdir/build/sdk/staging_dir/hostpkg/lib/python3.7/site-packages/pip/_vendor/packaging/tags.py", line 642, in _linux_platforms
_, arch = linux.split("_", 1)
ValueError: not enough values to unpack (expected 2, got 1)
Makefile:35: recipe for target '/builder/shared-workdir/build/sdk/build_dir/target-arm_cortex-a9+vfpv3-d16_musl_eabi/pypi/python-zipp-python3/zipp-0.6.0/.built' failed