diff -Nur work.orig/usr.bin/minigzip/Makefile work/usr.bin/minigzip/Makefile
--- work.orig/usr.bin/minigzip/Makefile	2012-07-16 04:39:31.000000000 +0900
+++ work/usr.bin/minigzip/Makefile	2012-07-16 04:45:30.000000000 +0900
@@ -10,4 +10,6 @@
 DPADD=	${LIBZ}
 LDADD=	-lz
 
+CFLAGS+= -I${.CURDIR}/../../lib/libz
+
 .include <bsd.prog.mk>