stal/IX is a statically linked Linux distribution, so 3D drivers are also compiled statically.
The driver is selected by specifying –opengl=…, –vulkan=…, at the time of the application build, or realm.
It can be installed in the realm:
user# ix mut --opengl=mesa/aco --vulkan=mesa/aco
Then all applications built in this realm using ix mut/ix let will use the selected driver.
Or for a standalone application:
user# ix build bin/gnome/text/editor --opengl=angle --vulkan=amd/vlk
How to get a list of available drivers:
user# ix tool listall | grep mesa/ | grep -v mesa/dl | grep -v /fakes
lib/mesa/anv
lib/mesa/base
lib/mesa/nouveau
lib/mesa/nvk
lib/mesa/llvm
lib/mesa/opengl
lib/mesa/vulkan
lib/mesa/iris
lib/mesa/soft
lib/mesa/aco
lib/mesa/intel
lib/mesa/radv
lib/mesa/radeonsi
lib/mesa/valve
Rule of thumb - if the name matches the name of the Vulkan driver from Mesa, then Zink will be chosen as the OpenGL driver - https://docs.mesa3d.org/drivers/zink.html.
So, to use the Zink + Vulkan AMD RADV driver, run:
user# ix mut --opengl=mesa/radv --vulkan=mesa/radv
If zink + vulkan is a good choice for you, it is preferable because the ACO shader compiler is significantly smaller in size than the LLVM variant.
Also one can use:
user# ix build bin/gnome/text/editor --opengl=angle ...
For google’s ANGLE opengl driver - https://github.com/google/angle
And:
user# ix build bin/gnome/text/editor --vulkan=amd/vlk ...
For AMD’s https://github.com/GPUOpen-Drivers/AMDVLK
export WLR_RENDERER=vulkan # for wlroots-based composers
export MESA_LOADER_DRIVER_OVERRIDE=zink