Version: (using KDE 4.3.1) OS: Linux Installed from: Compiled From Sources The directory name is "phonon" not "Phonon" (lowercase). At least in qt 4.5.2. In file included from /src/a/kde/4.3.1/o/base/apps/dolphin/src/moc_phononwidget.cpp:10, from /src/a/kde/4.3.1/o/base/apps/dolphin/src/dolphin_automoc.cpp:4: /src/a/kde/4.3.1/o/base/apps/dolphin/src/../../../../../kdebase-4.3.1/apps/dolphin/src/panels/information/phononwidget.h:29:25: error: Phonon/Global: No such file or directory