devel/qt6-base: make X11 optional
> qt6-base-6.4.2_2 depends on shared library: libGL.so - not found
> Installing existing package /packages/All/libglvnd-1.6.0.pkg
Installing libglvnd-1.6.0...
the most recent version of libglvnd-1.6.0 is already installed
> qt6-base-6.4.2_2 depends on shared library: libGL.so - not found
- Error code 1