Index: modules/diagrams/direction.tcl
--- modules/diagrams/direction.tcl.orig
+++ modules/diagrams/direction.tcl
@@ -28,8 +28,8 @@
 # # ## ### ##### ######## ############# ######################
 ## Requisites
 
-package require Tcl 8.5 ; # Want the nice things it brings (dicts, {*}, etc.)
-package require snit    ; # Object framework.
+package require Tcl 8.5- ; # Want the nice things it brings (dicts, {*}, etc.)
+package require snit     ; # Object framework.
 
 # # ## ### ##### ######## ############# ######################
 ## Implementation
