/usr/lib/tcltk/rivet2.1/packages/ is in libapache2-mod-rivet 2.1.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/tcltk/rivet2.1/packages/README
/usr/lib/tcltk/rivet2.1/packages/calendar/
/usr/lib/tcltk/rivet2.1/packages/calendar/calendar.tcl
/usr/lib/tcltk/rivet2.1/packages/commserver/
/usr/lib/tcltk/rivet2.1/packages/commserver/commserver.tcl
/usr/lib/tcltk/rivet2.1/packages/commserver/server.tcl
/usr/lib/tcltk/rivet2.1/packages/dio/
/usr/lib/tcltk/rivet2.1/packages/dio/dio.tcl
/usr/lib/tcltk/rivet2.1/packages/dio/dio_Mysql.tcl
/usr/lib/tcltk/rivet2.1/packages/dio/dio_Oracle.tcl
/usr/lib/tcltk/rivet2.1/packages/dio/dio_Postgresql.tcl
/usr/lib/tcltk/rivet2.1/packages/dio/dio_Sqlite.tcl
/usr/lib/tcltk/rivet2.1/packages/dio/diodisplay.tcl
/usr/lib/tcltk/rivet2.1/packages/dtcl/
/usr/lib/tcltk/rivet2.1/packages/dtcl/dtcl.tcl
/usr/lib/tcltk/rivet2.1/packages/entities/
/usr/lib/tcltk/rivet2.1/packages/entities/entities.tcl
/usr/lib/tcltk/rivet2.1/packages/form/
/usr/lib/tcltk/rivet2.1/packages/form/form.tcl
/usr/lib/tcltk/rivet2.1/packages/form/form2.tcl
/usr/lib/tcltk/rivet2.1/packages/rivet_ncgi/
/usr/lib/tcltk/rivet2.1/packages/rivet_ncgi/rivet_ncgi.tcl
/usr/lib/tcltk/rivet2.1/packages/session/
/usr/lib/tcltk/rivet2.1/packages/session/README.txt
/usr/lib/tcltk/rivet2.1/packages/session/session-class.tcl
/usr/lib/tcltk/rivet2.1/packages/session/session-create-mysql.sql
/usr/lib/tcltk/rivet2.1/packages/session/session-create-oracle.sql
/usr/lib/tcltk/rivet2.1/packages/session/session-create-postgresql.sql
/usr/lib/tcltk/rivet2.1/packages/session/session-create-sqlite.sql
/usr/lib/tcltk/rivet2.1/packages/session/session-demo.rvt
/usr/lib/tcltk/rivet2.1/packages/session/session-drop.sql
/usr/lib/tcltk/rivet2.1/packages/session/session-httpd.conf
/usr/lib/tcltk/rivet2.1/packages/session/session-purge-mysql.sql
/usr/lib/tcltk/rivet2.1/packages/simpledb/
/usr/lib/tcltk/rivet2.1/packages/simpledb/simpledb.tcl
/usr/lib/tcltk/rivet2.1/packages/simpledb/simpledb.test
/usr/lib/tcltk/rivet2.1/packages/tclrivet/
/usr/lib/tcltk/rivet2.1/packages/tclrivet/README
/usr/lib/tcltk/rivet2.1/packages/tclrivet/parse.tcl
/usr/lib/tcltk/rivet2.1/packages/tclrivet/tclrivet.tcl
/usr/lib/tcltk/rivet2.1/packages/tclrivet/tclrivetparser.tcl