diff -r bc772694cfbd -r c39614ddb80b src/Pure/build-jars
--- a/src/Pure/build-jars	Tue Mar 15 16:23:27 2016 +0100
+++ b/src/Pure/build-jars	Tue Mar 15 22:01:26 2016 +0100
@@ -90,6 +90,7 @@
   System/utf8.scala
   Thy/html.scala
   Thy/present.scala
+  Thy/sessions.scala
   Thy/thy_header.scala
   Thy/thy_info.scala
   Thy/thy_syntax.scala