--- a/Makefile
+++ b/Makefile
@@ -1,26 +1,26 @@
-CPPFLAGS	:= -I.
-CFLAGS		:= -g -Wall -Werror
-CXXFLAGS	:= -g -Wall -Werror
+CPPFLAGS	+= -I.
+CFLAGS		?= -g -Wall -Werror
+CXXFLAGS	?= -g -Wall -Werror
 INSTALL		:= install
 DESTDIR		:=
 SPECFILE	:= keyutils.spec
 NO_GLIBC_KEYERR	:= 0
 NO_ARLIB	:= 0
 NO_SOLIB	:= 0
-ETCDIR		:= /etc
-BINDIR		:= /bin
-SBINDIR		:= /sbin
-SHAREDIR	:= /usr/share/keyutils
-MANDIR		:= /usr/share/man
+ETCDIR		:= @TERMUX_PREFIX@/etc
+BINDIR		:= @TERMUX_PREFIX@/bin
+SBINDIR		:= @TERMUX_PREFIX@/bin
+SHAREDIR	:= @TERMUX_PREFIX@/share/keyutils
+MANDIR		:= @TERMUX_PREFIX@/share/man
 MAN1		:= $(MANDIR)/man1
 MAN3		:= $(MANDIR)/man3
 MAN5		:= $(MANDIR)/man5
 MAN7		:= $(MANDIR)/man7
 MAN8		:= $(MANDIR)/man8
-INCLUDEDIR	:= /usr/include
+INCLUDEDIR	:= @TERMUX_PREFIX@/include
 LN		:= ln
 LNS		:= $(LN) -sf
-PREFIX 		:= /usr
+PREFIX 		:= @TERMUX_PREFIX@
 
 ###############################################################################
 #
@@ -59,12 +59,12 @@
 #
 ###############################################################################
 ifeq ($(origin LIBDIR),undefined)
-LIBDIR		:= $(shell ldd /usr/bin/make | grep '\(/libc[.]\)' | sed -e 's!.*\(/.*\)/libc[.].*!\1!')
+LIBDIR		:= @TERMUX_PREFIX@/lib
 endif
 ifeq ($(origin USRLIBDIR),undefined)
-USRLIBDIR	:= $(patsubst /lib/%,/usr/lib/%,$(LIBDIR))
+USRLIBDIR	:= @TERMUX_PREFIX@/lib
 endif
-BUILDFOR	:= $(shell file /usr/bin/make | sed -e 's!.*ELF \(32\|64\)-bit.*!\1!')-bit
+BUILDFOR	:=
 
 ifeq ($(origin CFLAGS),undefined)
 ifeq ($(BUILDFOR),32-bit)
@@ -161,7 +161,7 @@
 
 key.dns_resolver: key.dns_resolver.o dns.afsdb.o $(LIB_DEPENDENCY)
 	$(CC) -L. $(CFLAGS) $(LDFLAGS) $(RPATH) -o $@ \
-		key.dns_resolver.o dns.afsdb.o -lkeyutils -lresolv
+		key.dns_resolver.o dns.afsdb.o -lkeyutils
 
 key.dns_resolver.o: key.dns_resolver.c key.dns.h
 dns.afsdb.o: dns.afsdb.c key.dns.h