Without this patch I'm getting the following build error when building
with Nix:
FAILED: backend/wlr_backend@sta/session_direct-ipc.c.o
In file included from ../backend/session/direct-ipc.c:20:0:
/nix/store/9ac27wk5vh47p28gladbdfafpidrx9rh-libdrm-2.4.88-dev/include/xf86drm.h:40:17: fatal error: drm.h: No such file or directory
#include <drm.h>
^
compilation terminated.