diff --git a/src/Makefile b/src/Makefile
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,18 +1,20 @@
 # $Id$
 
+QMAKE = qmake
+
 all: VirtualLeaf libplugin plugins
 
 VirtualLeaf: Makefile.VirtualLeaf
 	make -f Makefile.VirtualLeaf
 
 Makefile.VirtualLeaf: VirtualLeaf.pro
-	qmake -makefile -o $@ $< 
+	$(QMAKE) -makefile -o $@ $< 
 
 libplugin: Makefile.libplugin
 	make -f Makefile.libplugin
 
 Makefile.libplugin: libplugin.pro
-	qmake -makefile -o $@ $< 
+	$(QMAKE) -makefile -o $@ $< 
 
 plugins:
 	make -C build_models