diff -ruN pptpd-1.3.0.orig/Makefile.am pptpd-1.3.0/Makefile.am
--- pptpd-1.3.0.orig/Makefile.am	2006-07-26 18:05:12 +0400
+++ pptpd-1.3.0/Makefile.am	2006-07-26 18:04:49 +0400
@@ -1,3 +1,4 @@
+export LIBDIR=$(libdir)/pptpd
 # We have our own, simpler dependencies stuff in 'reconf'
 AUTOMAKE_OPTIONS = no-dependencies foreign
 
diff -ruN pptpd-1.3.0.orig/plugins/Makefile pptpd-1.3.0/plugins/Makefile
--- pptpd-1.3.0.orig/plugins/Makefile	2006-07-26 18:04:11 +0400
+++ pptpd-1.3.0/plugins/Makefile	2006-07-26 18:05:04 +0400
@@ -17,7 +17,7 @@
 %.so: %.c
 	$(CC) -o $@ $(LDFLAGS) $(CFLAGS) $^
 
-LIBDIR	= $(DESTDIR)$(prefix)/lib/pptpd
+LIBDIR	?= $(DESTDIR)$(prefix)/lib/pptpd
 
 install: $(PLUGINS)
 	$(INSTALL) -d $(LIBDIR)