--- src/Makefile.in.orig	2003-09-20 10:23:28.000000000 -0400
+++ src/Makefile.in	2014-08-15 12:59:59.000000000 -0400
@@ -1,9 +1,9 @@
 CC=gcc
-INC=-I../include
+INC=-I../include ${CPPFLAGS}
 CFLAGS=@CFLAGS@
 PREFIX=@prefix@
 BINDIR=$(PREFIX)/bin
-LIBS=@LIBS@
+LIBS=@LIBS@ ${LDFLAGS}
 
 elf:		main.o elf.o
 		$(CC) $(CFLAGS) $(INC) main.o elf.o -o elf $(LIBS)
@@ -16,7 +16,7 @@
 		$(CC) $(CFLAGS) $(INC) -c main.c
 
 install:	elf
-		cp elf $(BINDIR)
+		cp elf $(DESTDIR)$(BINDIR)
 
 uninstall:	install
 		rm $(BINDIR)/elf