Haaaan, Okay! Thanks for explanations!
In any case, boom:
[eyome@nixos:~]$ nvidia-offload glxinfo -B
name of display: :0
display: :0 screen: 0
direct rendering: Yes
Memory info (GL_NVX_gpu_memory_info):
Dedicated video memory: 2048 MB
Total available memory: 2048 MB
Currently available dedicated video memory: 1944 MB
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: Quadro K1000M/PCIe/SSE2
OpenGL core profile version string: 4.6.0 NVIDIA 470.182.03
OpenGL core profile shading language version string: 4.60 NVIDIA
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL version string: 4.6.0 NVIDIA 470.182.03
OpenGL shading language version string: 4.60 NVIDIA
OpenGL context flags: (none)
OpenGL profile mask: (none)
OpenGL ES profile version string: OpenGL ES 3.2 NVIDIA 470.182.03
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
It works! Thank you!
If I have others issues with Lutris I’ll open another post, this one is already full and useful 