libgnome-keyring fails to build with the USE flag 'vala'.
This issue exists both on Next and 1.4.
Here is the error message:
/usr/bin/vapigen-0.48 --library gnome-keyring-1 --metadatadir . GnomeKeyring-1.0.gir ./GnomeKeyring-1.0-custom.vala
GnomeKeyring-1.0.metadata:57.1-57.6: error: expected pattern or `.', got `unlock'
unlock skip=false
^^^^^^
The full build log is attached.