It looks like the msys2 command has been changed from a `.bat` file to a `.cmd` file, but the MSYS2 Shell launcher isn't updated by the installer. https://github.com/Alexpux/MSYS2-packages/issues/625
It looks like the msys2 command has been changed from a
.batfile to a.cmdfile, but the MSYS2 Shell launcher isn't updated by the installer.msys2/MSYS2-packages#625