--- a/src/Pure/System/scala.scala Sat Nov 28 20:18:29 2020 +0100
+++ b/src/Pure/System/scala.scala Sat Nov 28 21:56:24 2020 +0100
@@ -243,4 +243,5 @@
Scala.Sleep,
Scala.Toplevel,
Doc.Doc_Names,
- Bibtex.Check_Database)
+ Bibtex.Check_Database,
+ Isabelle_Tool.Isabelle_Tools)