In kdenlive, I can't add any media ("clips") to a project because the file choosing dialog is not working.
Basically, open kdenlive, click on the "Project" menu, then "Add Clip". This opens a file chooser dialog that should let you find and select some files. However, the dialog is blank and cannot display any files or folders. The problem goes away when using the qt-build-system. I'm not sure if anything is lost by deleting the wrap-program phase. Patch to follow.