diff -Nurd -x'*~' pth-2.0.7.orig/Makefile.in pth-2.0.7/Makefile.in
--- pth-2.0.7.orig/Makefile.in	2006-06-08 13:54:01.000000000 -0400
+++ pth-2.0.7/Makefile.in	2013-06-15 13:59:11.000000000 -0400
@@ -53,7 +53,7 @@
 
 SHELL       = /bin/sh
 CC          = @CC@
-CPPFLAGS    = @CPPFLAGS@ -I.
+CPPFLAGS    = -I. @CPPFLAGS@
 CFLAGS      = @CFLAGS@
 LDFLAGS     = @LDFLAGS@
 MKFLAGS     = $(MFLAGS) DESTDIR=$(DESTDIR)