diff --git a/qt/makefile b/qt/makefile
index 8ce101a..de09eb5 100644
--- a/qt/makefile
+++ b/qt/makefile
@@ -13,6 +13,7 @@ ${QT}: ${QT}.tar.gz
 	cd $@ && patch -p1 < ../patch/qt-sources-patch.diff
 
 build: ${QT}
+	-cd $< && make confclean
 	cd $< && (echo "yes" | ./configure -opensource -prefix /usr/local/trolltech/qt)
 	cd $< && make
 
@@ -23,6 +24,7 @@ ${QT}-lin32: ${QT}
 	cp -a $< $@
 
 build-lin32: ${QT}-lin32
+	-cd $< && make confclean
 	cd $< && (echo "yes" | ./configure -opensource -platform linux-g++-32 -prefix /usr/local/trolltech/qt-32bit)
 	cd $< && make