diff -r 1edc81c78079 -r 21361b6189a6 lib/Tools/build
--- a/lib/Tools/build	Sat Jul 28 14:52:56 2012 +0200
+++ b/lib/Tools/build	Sat Jul 28 15:21:49 2012 +0200
@@ -30,7 +30,7 @@
   echo "    -b           build heap images"
   echo "    -d DIR       include session directory with ROOT file"
   echo "    -g NAME      select session group NAME"
-  echo "    -j INT       maximum number of jobs (default 1)"
+  echo "    -j INT       maximum number of parallel jobs (default 1)"
   echo "    -n           no build -- test dependencies only"
   echo "    -o OPTION    override session configuration OPTION (via NAME=VAL or NAME)"
   echo "    -s           system build mode: produce output in ISABELLE_HOME"