This package fails to build on an unstable system. Attached relevant logs and emerge --info
Created attachment 717780 [details] emerge_info emerge --info
Created attachment 717783 [details] gazebo-11.5.1-r1:20210623-020710.log.xz build log (compressed because it exceeds attachment limit, use 'xzless' to read it)
"solved" by rebuilding ignition* packages