diff -r 6b213c0115f5 -r 4313e6c9969a lib/scripts/getsettings
--- a/lib/scripts/getsettings	Thu Jul 15 22:07:56 2021 +0200
+++ b/lib/scripts/getsettings	Thu Jul 15 22:09:45 2021 +0200
@@ -129,7 +129,9 @@
   export JAVA_HOME="$ISABELLE_JDK_HOME"
 fi
 
-ISABELLE_SETUP_CLASSPATH="$(isabelle_java java -jar "$(platform_path "$ISABELLE_SETUP_JAR")" classpath)"
+if [ -e "$ISABELLE_SETUP_JAR" ]; then
+  ISABELLE_SETUP_CLASSPATH="$(isabelle_java java -jar "$(platform_path "$ISABELLE_SETUP_JAR")" classpath)"
+fi
 
 set +o allexport