Hi, to run Windows 11 as Virtualbox guest I build Virtualbox < version 7. My current installed virtualbox was build against python 3.10.10-1. Today building against python 3.11.3-1 failed with "Checking for Python support: ** Python not found!". I can still start a Windows 11 guest with virtualbox build against python 3.10.10-1 on the machine that is updated to python 3.11.3-1. However, the situation threatens to become more serious. • rocketmouse@archlinux /.tmp/virtualbox-epoch1-6.1.40 $ pacman -Q python python 3.11.3-1 • rocketmouse@archlinux /.tmp/virtualbox-epoch1-6.1.40 $ grep SUPPYTHONLIBS= chroot/rocketmouse/build/virtualbox/src/VirtualBox-6.1.40/configure SUPPYTHONLIBS="python2.7 python2.6 python3.1 python3.2 python3.3 python3.4 python3.4m python3.5 python3.5m python3.6 python3.6m python3.7 python3.7m python3.8 python3.8m python3.9 python3.9m python3.10 python3.10m" • rocketmouse@archlinux /.tmp/virtualbox-epoch1-6.1.40 $ grep " python (" /var/log/pacman.log | tail -1 [2023-05-04T01:05:49+0200] [ALPM] upgraded python (3.10.10-1 -> 3.11.3-1) • rocketmouse@archlinux /.tmp/virtualbox-epoch1-6.1.40 $ pacman -Q virtualbox virtualbox 1:6.1.40-708.1 I want to build virtualbox 1:6.1.40-708.2 against latest version of python. Maybe I don't need to do this, but soon or later I at least need to build against another dependency and then python is involved, too. Perhaps just adding python3.11 to configure's SUPPYTHONLIBS already does the job to build virtualbox, without fixing something else. If so, the end of building virtualbox < version 7 to run Windows 11 guests is still close. What are you doing to run a Windows 11 guest? Regards, Ralf