Without this `make tmp/AttributesView.o` fails with
src/view/dialogs/AddEditAttribute.h:22:35: fatal error: ui_add_edit_attribute.h: No such file or directory
--- a/guitone.pro
+++ b/guitone.pro
@@ -215 +215,2 @@ help.commands = @echo Available targets: $${QMAKE_EXTRA_TARGETS}
 QMAKE_EXTRA_TARGETS += help
+CONFIG += depend_includepath