rdp-plugin requires x11 libraries
True! We have remmina-plugins/rdp/rdp_event.c that uses X11/XKBlib.h
I was just wondering how it works on other distributions... Maybe it's one of the dependencies imposed, by default, by the build systems.
Also on openSUSE it could be built before.
Those changes in the building-process on freerdp and remmina introduced in the last weeks have uncovered this issue.