Gentoo's Bugzilla –
Attachment 326174 Details for
Bug 428146sys-boot/plymouth-0.8.4 with x11-libs/libdrm-2.4.37 - .../work/plymouth-0.8.4/src/plugins/renderers/drm/ply-renderer-nouveau-driver.c:45:27: fatal error: nouveau_drmif.h: No such file or directory