https://bugs.freedesktop.org/show_bug.cgi?id=75453
--- Comment #1 from Emil Velikov emil.l.velikov@gmail.com --- Two distinct things happening here - I've assumed that string as "" is considered of length zero, thus an empty dri megadriver is built.
- gallium_require_drm_loader is missing for the i915, r300 and possibly svga gallium drivers.
Will send patches for both shortly