diff -r 60b6c759134f -r e1b4b14ded58 lib/Tools/scalac
--- a/lib/Tools/scalac	Fri Oct 05 17:49:10 2018 +0200
+++ b/lib/Tools/scalac	Fri Oct 05 23:49:12 2018 +0200
@@ -7,5 +7,4 @@
 isabelle_admin_build jars || exit $?
 
 isabelle_scala scalac -Dfile.encoding=UTF-8 \
-  "-Djava.ext.dirs=$(platform_path "$ISABELLE_JDK_HOME/jre/lib/ext")" \
   -classpath "$(platform_path "$ISABELLE_CLASSPATH")" "$@"