Created attachment 920955 [details] build.log Clapper fails to build when the gtk use-flag is set while the gstreamer flag is not set. Adding both the gtk and gstreamer flags resolves this issue. Specifically, when the gstreamer use flag is not set, the package fails during the configure phase, specifying it cannot find libpeas-2. This seems odd, as gstreamer does not seem to pull in dev-libs/libpeas.
Created attachment 920956 [details] emerge --info