fixed a typo regarding metadata directory.
diff --git a/releng/build-scripts/build/otdt_prerequisites.sh b/releng/build-scripts/build/otdt_prerequisites.sh
index aac00ac..ad0c4da 100644
--- a/releng/build-scripts/build/otdt_prerequisites.sh
+++ b/releng/build-scripts/build/otdt_prerequisites.sh
@@ -21,7 +21,7 @@
 TMPDIR="${BASEDIR}/tmp"
 
 # EXPORT: directory for metadata from previous builds:
-METADATA="${BASEDIR}/metadata}"
+METADATA="${BASEDIR}/metadata"
 
 # EXPORT: mail address to receive notification about build result (currently only build failures):
 OT_RECIPIENT="stephan@cs.tu-berlin.de"