Index: scripts/Makefile.frag
--- scripts/Makefile.frag.orig
+++ scripts/Makefile.frag
@@ -2,8 +2,8 @@
 # Build environment install
 #
 
-phpincludedir = $(includedir)/php
-phpbuilddir = $(libdir)/build
+phpincludedir = $(peardir)/include
+phpbuilddir = $(peardir)/build
 
 BUILD_FILES = \
 	scripts/phpize.m4 \