QT4_WRAP_UI(_UIC ${gui_UICS})
QT4_WRAP_CPP(_MOC ${gui_MOCS})
-ADD_LIBRARY(gui ${_UIC} ${_MOC} ${gui_HDRS} ${gui_SRCS})
+# We need to workaround a dependency bug with out-of-source builds...
+SET_SOURCE_FILES_PROPERTIES(${gui_SRCS} PROPERTIES
+OBJECT_DEPENDS "${_UIC}")
+INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
+
+ADD_LIBRARY(gui ${gui_HDRS} ${gui_SRCS} ${_MOC} ${_UIC})