[Nix-dev] root OpenGL: 1.4/2.1.2; user OpenGL 4.4

[Mateusz Kowalczyk]

Hi,

I tried to run a graphical application as root for various dubious
reasons just to find out that I have problems doing so. In fact:

[root at lenalee:/tmp]# glxinfo | grep 'OpenGL version'
libGL error: failed to load driver: swrast
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
OpenGL version string: 1.4 (2.1.2 NVIDIA 331.79)

[shana at lenalee:/tmp]$ glxinfo | grep 'OpenGL version'
OpenGL version string: 4.4.0 NVIDIA 331.79

[root at lenalee:/tmp]# ldd `which PPSSPPQt` | grep libGL
        libGL.so.1 =>
/nix/store/cs95cfgbfkmjykbxx3h2wv1j8d22kdhj-mesa-noglu-10.1.4/lib/libGL.so.1
(0xb67c8000)

[shana at lenalee:/tmp]$ ldd `which PPSSPPQt` | grep libGL
        libGL.so.1 => /run/opengl-driver/lib/libGL.so.1 (0xb6755000)

Huh, what gives? Why isn't the root case also
/run/opengl-driver/lib/libGL.so.1? Why aren't the versions the same? Why
is the root version so crippled? How do I fix it? The program is the
same derivation.

-- 
Mateusz K.