Created attachment 873172 [details] build log Dear maintainer, I'm attaching the build log. The relevant error seems to be: <artificial>:(.text+0x60c3): undefined reference to `lyx::frontend::GuiView::zoom_min_'
Please provide emerge --info.
Should be fixed in 2.4.0_rc4 which I just pushed. I'll wait to close the bug when we stabilize it instead.