Index: build
==================================================================
--- build
+++ build
@@ -1,7 +1,8 @@
 #! /usr/bin/env bash
 
+# Set timezone to default
 TZ=UTC
 export TZ
 
 targetmode='install'
 if [ "$1" == '--cpio' ]; then
@@ -49,10 +50,14 @@
 
 function configure() {
 	glibcvers=2.20
 	glibcdir="/opt/appfs/core.appfs.rkeene.org/glibc/platform/${glibcvers}"
 	dynlinker="$(ls "${glibcdir}"/lib/ld-linux*.so.* | tail -n 1)"
+
+	if [ ! -d "${glibcdir}" ]; then
+		die 'glibc directory is not available (appfs running/working?)'
+	fi
 
 	CFLAGS="-I${glibcdir}/include"
 	CPPFLAGS="-I${glibcdir}/include"
 	LDFLAGS="-Wl,--rpath,${glibcdir}/lib -Wl,--dynamic-linker,${dynlinker}"
 	export CFLAGS CPPFLAGS LDFLAGS