add option "build_context" in anticipation of AFP entries that require special tricks in Isabelle/ML (NB: system component settings are unavailable in AFP);
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke Scala compiler within the Isabelle environment
isabelle scala_build || exit $?
classpath "$ISABELLE_SETUP_CLASSPATH"; unset ISABELLE_SETUP_CLASSPATH
classpath "$CLASSPATH"; export CLASSPATH=""
isabelle_scala scalac -Dfile.encoding=UTF-8 \
-classpath "$(platform_path "$ISABELLE_CLASSPATH")" "$@"