问题
I am using msys2 from PortableApps, under Win 10.
When I try a full upgrade with pacman -Syuu, I get
:: Synchronizing package databases...
mingw32 456.6 KiB 773 KiB/s 00:01 [###########################################################] 100%
mingw32.sig 119.0 B 0.00 B/s 00:00 [###########################################################] 100%
mingw64 459.4 KiB 792 KiB/s 00:01 [###########################################################] 100%
mingw64.sig 119.0 B 0.00 B/s 00:00 [###########################################################] 100%
msys is up to date
:: Starting core system upgrade...
there is nothing to do
:: Starting full system upgrade...
:: Replace bzr with msys/breezy? [Y/n] n
:: Replace mingw-w64-x86_64-pygobject-devel with mingw64/mingw-w64-x86_64-python-gobject? [Y/n] y
:: Replace mingw-w64-x86_64-pyqt5-common with mingw64/mingw-w64-x86_64-python-pyqt5? [Y/n] y
:: Replace python3-appdirs with msys/python-appdirs? [Y/n] y
:: Replace python3-attrs with msys/python-attrs? [Y/n] y
:: Replace python3-packaging with msys/python-packaging? [Y/n] y
:: Replace python3-pip with msys/python-pip? [Y/n] y
:: Replace python3-pyparsing with msys/python-pyparsing? [Y/n] y
:: Replace python3-setuptools with msys/python-setuptools? [Y/n] y
:: Replace python3-six with msys/python-six? [Y/n]
resolving dependencies...
looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: removing mingw-w64-x86_64-pyqt5-common breaks dependency 'mingw-w64-x86_64-pyqt5-common' required by mingw-w64-x86_64-python2-pyqt5
It looks to me that I would not be able to retain python2-qt5.
Is there any workaround for that? I could keep answering no, but I guess I should give up at some point.
Note 1: I wonder if there is any connection with the packages reported as requiring update and Msys2 with python 3.8: ImportError: cannot import name 'open_code' from 'io'
Note 2: I never installed any package with pip, but always with pacman.
来源：https://stackoverflow.com/questions/61264463/msys2-upgrade-breaks-python2-pyqt5