--- Makefile.orig	2015-10-08 16:16:03 UTC
+++ Makefile
@@ -38,11 +38,13 @@ CFLAGS += -DMINIUPNPC_GET_SRC_ADDR
 CFLAGS += -D_BSD_SOURCE
 CFLAGS += -D_DEFAULT_SOURCE
 ifneq ($(OS), FreeBSD)
+ifneq ($(OS), BSDSUniX)
 ifneq ($(OS), Darwin)
 #CFLAGS += -D_POSIX_C_SOURCE=200112L
 CFLAGS += -D_XOPEN_SOURCE=600
 endif
 endif
+endif
 #CFLAGS += -ansi
 # -DNO_GETADDRINFO
 INSTALL = install
@@ -133,13 +135,11 @@ TESTMINIWGETOBJS := $(TESTMINIWGETOBJS) 
 TESTIGDDESCPARSE := $(TESTIGDDESCPARSE) minissdpc.o
 endif
 
-LIBDIR ?= lib
 # install directories
-INSTALLPREFIX ?= $(PREFIX)/usr
 INSTALLDIRINC = $(INSTALLPREFIX)/include/miniupnpc
-INSTALLDIRLIB = $(INSTALLPREFIX)/$(LIBDIR)
+INSTALLDIRLIB = $(INSTALLPREFIX)/lib
 INSTALLDIRBIN = $(INSTALLPREFIX)/bin
-INSTALLDIRMAN = $(INSTALLPREFIX)/share/man
+INSTALLDIRMAN = $(INSTALLPREFIX)/man
 
 FILESTOINSTALL = $(LIBRARY) $(EXECUTABLES)
 ifneq ($(OS), AmigaOS)