diff -rup gmic-1.6.5.0.orig/src/Makefile gmic-1.6.5.0.new/src/Makefile
--- gmic-1.6.5.0.orig/src/Makefile	2015-06-23 10:00:24.000000000 +0100
+++ gmic-1.6.5.0.new/src/Makefile	2015-06-23 13:12:03.085987526 +0100
@@ -348,7 +348,7 @@ zart: lib
 ifeq ($(OS),Darwin)
 	cd ../zart && qmake zart.pro && $(MAKE) "CFLAGS=$(OPT_CFLAGS)" "SUBLIBS=$(OPT_LIBS)" && strip zart.app/Contents/MacOS/zart
 else
-	cd ../zart && qmake zart.pro && $(MAKE) && strip zart
+	cd ../zart && qmake-qt5 zart.pro && $(MAKE) && strip zart
 endif
 
 # Internal rules to build compilation modules.