+ download-py3-libs
+ local mypy_dir=_build/deps-source/mypy/mypy-0.780
+ local py_package_dir=_cache/py3-libs
+ mkdir -p _cache/py3-libs
+ python3 -m pip download -d _cache/py3-libs -r _build/deps-source/mypy/mypy-0.780/test-requirements.txt
/usr/bin/python3: No module named pip