[Nix-dev] How to enable Vulkan on Intel?

[Moritz Ulrich]

Hello,

The current master contains mesa-13.x which supports the new Vulkan API.
However, `vulkaninfo` complains that it can't find `libvulkan_intel.so`
on my machine (a Lenovo Thinkpad x260).

The problematic lines in `vulkaninfo` look like this:

INFO: [loader] Code 0 : Found manifest file /run/opengl-driver/share/vulkan/icd.d/intel_icd.x86_64.json, version "1.0.0"
WARNING: [loader] Code 0 : /nix/store/vjlwiln5gl7xy2mz70rn350ckw14j32l-mesa-noglu-13.0.1/lib/libvulkan_intel.so: cannot open shared object file: No such file or directory

The culprit lies in intel_icd.x86_64.json which tells it to load
"/nix/store/vjlwiln5gl7xy2mz70rn350ckw14j32l-mesa-noglu-13.0.1/lib/libvulkan_intel.so",
which doesn't exist.

My guess is that the json file should point to
/run/opengl-driver/lib/libvulkan_intel.so instead. This file exists on
my setup.

Am I doing anything wrong, or is something in our packaging of
`vulkan-loaders` broken?


Cheers
Moritz