user/mesa: ERROR: Unknown variable "idep_xmlconfig_headers".
Found on pmmx, maybe it applies to others.
src/intel/vulkan/meson.build:131:0: ERROR: Unknown variable "idep_xmlconfig_headers".
A full log can be found at /root/packages/user/mesa/src/mesa-19.3.4/build/meson-logs/meson-log.txt
That log is attached meson-log.txt.