I had to remove the qt5 development libraries that were installed on my system in order to build kde-workspace from sources. I don't know if there is such thing as a "build conflict" stanza to put in debian/control.
Thanks! -- Ronoaldo Pereira http://www.ronoaldo.net/ -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org