--- ./include/Makefile.in.orig	2019-02-18 02:06:44 +0000
+++ ./include/Makefile.in	2019-02-18 02:08:07 +0000
@@ -314,7 +314,7 @@
 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
 
--- libffi.pc.in.orig	2019-02-18 02:15:08 +0000
+++ libffi.pc.in	2019-02-18 02:15:35 +0000
@@ -2,7 +2,7 @@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
 toolexeclibdir=@toolexeclibdir@
-includedir=${libdir}/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
+includedir=@includedir@
 
 Name: @PACKAGE_NAME@
 Description: Library supporting Foreign Function Interfaces