--- ppp-2.4.7/pppd/plugins/pppol2tp/Makefile.linux.old	2019-05-09 22:28:24.640793389 +0000
+++ ppp-2.4.7/pppd/plugins/pppol2tp/Makefile.linux	2019-05-09 23:02:56.955142166 +0000
@@ -4,7 +4,7 @@
 
 #***********************************************************************
 
-DESTDIR = @DESTDIR@
+DESTDIR = $(INSTROOT)@DESTDIR@
 LIBDIR = $(DESTDIR)/lib/pppd/$(VERSION)
 
 VERSION = $(shell awk -F '"' '/VERSION/ { print $$2; }' ../../patchlevel.h)