--- libffi-3.1.orig/include/Makefile.am	2014-04-25 19:45:13.000000000 +0200
+++ libffi-3.1/include/Makefile.am	2014-06-12 15:22:08.000000000 +0200
@@ -5,5 +5,5 @@ AUTOMAKE_OPTIONS=foreign
 DISTCLEANFILES=ffitarget.h
 EXTRA_DIST=ffi.h.in ffi_common.h
 
-includesdir = $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
+includesdir = $(prefix)/include
 nodist_includes_HEADERS = ffi.h ffitarget.h