diff -up QScintilla-gpl-2.4/designer-Qt4/designer.pro.qt4_designer_incpath QScintilla-gpl-2.4/designer-Qt4/designer.pro
--- QScintilla-gpl-2.4/designer-Qt4/designer.pro.qt4_designer_incpath	2009-05-03 11:26:12.000000000 -0500
+++ QScintilla-gpl-2.4/designer-Qt4/designer.pro	2009-10-21 08:01:56.561731098 -0500
@@ -12,4 +12,6 @@ SOURCES = qscintillaplugin.cpp
 target.path = $$[QT_INSTALL_PLUGINS]/designer
 INSTALLS += target
 
-LIBS += -lqscintilla2
+LIBS += -L$(DESTDIR)../Qt4 -lqscintilla2
+
+INCPATH = $(DESTDIR)../Qt4