$ cat configure-sh.patch

--- build/build/make/configure.sh
+++ build/build/make/configure.sh
@@ -732,9 +732,6 @@
   prefix="${prefix%/}"
   libdir="${libdir:-${prefix}/lib}"
   libdir="${libdir%/}"
-  if [ "${libdir#${prefix}}" = "${libdir}" ]; then
-    die "Libdir ${libdir} must be a subdirectory of ${prefix}"
-  fi
 }
 
 post_process_cmdline() {