diff -up libffi-3.0.13/include/Makefile.am.fixpath libffi-3.0.13/include/Makefile.am
--- libffi-3.0.13/include/Makefile.am.fixpath	2013-05-25 22:11:25.983889342 -0400
+++ libffi-3.0.13/include/Makefile.am	2013-05-25 22:12:12.337890037 -0400
@@ -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 = $(includedir)/
 nodist_includes_HEADERS = ffi.h ffitarget.h
diff -up libffi-3.0.13/include/Makefile.in.fixpath libffi-3.0.13/include/Makefile.in
--- libffi-3.0.13/include/Makefile.in.fixpath	2013-05-25 22:12:56.259890696 -0400
+++ libffi-3.0.13/include/Makefile.in	2013-05-25 22:13:12.101890934 -0400
@@ -250,7 +250,7 @@ top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = foreign
 DISTCLEANFILES = ffitarget.h
 EXTRA_DIST = ffi.h.in ffi_common.h
-includesdir = $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
+includesdir = $(includedir)/
 nodist_includes_HEADERS = ffi.h ffitarget.h
 all: all-am
 
diff -up libffi-3.0.13/libffi.pc.in.fixpath libffi-3.0.13/libffi.pc.in
--- libffi-3.0.13/libffi.pc.in.fixpath	2013-05-25 22:14:21.037891968 -0400
+++ libffi-3.0.13/libffi.pc.in	2013-05-25 22:14:31.652892128 -0400
@@ -1,7 +1,7 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
-includedir=${libdir}/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
+includedir=@includedir@
 
 Name: @PACKAGE_NAME@
 Description: Library supporting Foreign Function Interfaces