Created attachment 713205 [details] build log this version of sway seems to fail for me, but the previous 1.5.1-r1 works fine. Based on the error message I think it has to do with wl-roots compatability? I've attached the build.log
Created attachment 713208 [details] output of emerge -pqv '=gui-wm/sway-1.6::gentoo'
Created attachment 713211 [details] output of emerge --info '=gui-wm/sway-1.6::gentoo'
actually, installing wl-roots manually through github seems to fix this.
perhaps this was just something specific to my system? Unless this issue comes up on a clean install, perhaps you set this bug report as resolved