diff --git a/Makefile.ncu b/Makefile.ncu
index e852faf..d5b5b2d 100644
--- a/Makefile.ncu
+++ b/Makefile.ncu
@@ -19,13 +19,13 @@ DEFS =  -DHAVE_STRING=1 -DHAVE_STDLIB=1 -DHAVE_RAISE=1 -DHAVE_UNISTD=1
 
 # Revised by JBV
 #CFLAGS = -O
-CFLAGS = -g -ansi
+CFLAGS += -g -ansi
 
 # Revised by JBV
 #LDFLAGS = -s
 
 prefix = /usr/local
-exec_prefix = $(prefix)
+exec_prefix = $(DESTDIR)$(prefix)
 bindir = $(exec_prefix)/bin
 
 SHELL = /bin/sh
@@ -87,6 +87,7 @@ $(OFILES):      $(HFILES)
 	$(CC) -c $(CPPFLAGS) -I$(srcdir) $(DEFS) $(CFLAGS) $<
 
 install: all
+	mkdir -p $(bindir)
 	$(INSTALL_PROGRAM) bwbasic $(bindir)/bwbasic
 
 uninstall:
