Otherwise - configure: error: Package requirements (libdrm >= 2.2 xf86driproto) were not met: Reproducible: Always Steps to Reproduce:
it requires xf86driproto in any version and libdrm >= 2.2 libdrm dependency is stated in ebuild, xf86driproto is stated in the eclass. There is chance you have updated overlay and not updated main tree because we moved the eclass from overlay to it.
Yes, that is indeed true.