--- Makefile.inc.orig	Sat Jul 15 05:56:54 2006
+++ Makefile.inc	Sat Apr 22 15:31:31 2017
@@ -2,15 +2,11 @@
 #
 # Default installation directories
 #
-PREFIX?=	/usr/local
-BINDIR?=	${PREFIX}/bin
-LIBDIR?=	${PREFIX}/lib
-.if !empty(unix:M*OpenBSD.)
-MANDIR?=	${PREFIX}/man/cat
-.else
-MANDIR?=	${PREFIX}/man
-.endif
+BINDIR=		${TRUEPREFIX}/bin
+LIBDIR=		${TRUEPREFIX}/lib
+MANDIR=		${TRUEPREFIX}/man/man
 
+
 # Name the default serial port to talk to the gps
 #
 GPS_SERIAL_PORT?=	/dev/tty00
@@ -28,7 +24,7 @@ SIO_TYPE?=	-DSIO_TYPE=BSD
 # C options
 #
 CFLAGS+= -g -I${.CURDIR}/../lib
-CFLAGS+= -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Werror
+CFLAGS+= -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes
 CFLAGS+= -DDEFAULT_PORT=\"${GPS_SERIAL_PORT}\" ${VERSION} ${SIO_TYPE}
 
 # Figure out where the library lives for proper dependencies