-EXT_CONF='ext/guestfs/extconf.rb'
-MAKEFILE='ext/guestfs/Makefile'
-GUESTFS_MODULE='ext/guestfs/_guestfs.so'
-GUESTFS_SRC='ext/guestfs/_guestfs.c'
+EXT_CONF='@srcdir@/ext/guestfs/extconf.rb'
+MAKEFILE='@builddir@/ext/guestfs/Makefile'
+GUESTFS_MODULE='@builddir@/ext/guestfs/_guestfs.so'
+GUESTFS_SRC='@srcdir@/ext/guestfs/_guestfs.c'