--- Makefile.orig	2005-01-03 22:54:59.000000000 +0100
+++ Makefile	2013-09-28 12:52:00.901277718 +0200
@@ -12,7 +12,7 @@
 CC       = g++
 CFLAGS   = -g -O2 -Wall
 
-export prefix   = /usr/X11R6
+export prefix   = ${PREFIX}
 export XROOT    = $(prefix)
 DESTDIR  =
 INCLUDES = -I$(XROOT)/include
@@ -51,7 +51,7 @@
 	$(CC) $(OBJS) $(LDPATH) $(LIBS) -o $@
 
 $(SUBDIRS):
-	cd $@ && $(MAKE) $(MAKEFLAGS) $(MAKECMDGOALS)
+	cd $@ && $(MAKE) $(MAKECMDGOALS)
 
 $(OBJS): %.o: %.cc $(HEADERS)
 	$(CC) $(CFLAGS) $(DEFINES) $(INCLUDES) -c $< -o $@