--- Makefile.orig	2016-06-04 10:05:27 UTC
+++ Makefile
@@ -1,14 +1,14 @@
 PROG=		moo
 SRCS=		moo.c scan.c
 CPPFLAGS+=	-I${.CURDIR}
-COPTS+=		-Wall -W -Wno-unused -Wshadow -pedantic -std=c99
+CFLAGS+=		-Wall -W -Wno-unused -Wshadow -pedantic -std=c99
 CLEANFILES+=	moo.c y.tab.h scan.c lex.yy.c
 
 LOCALBASE?=/usr/local
 BINDIR=${LOCALBASE}/bin
 MANDIR=${LOCALBASE}/man/cat
 
-regress::
+regress:
 	cd ${.CURDIR}/regress && ${MAKE} MOO=${.OBJDIR}/moo
 
 .include <bsd.prog.mk>