Index: modules/map/box-entry.tcl
--- modules/map/box-entry.tcl.orig
+++ modules/map/box-entry.tcl
@@ -43,7 +43,7 @@ package provide map::box::entry 0.1
 # # ## ### ##### ######## ############# ######################
 ## Requirements
 
-package require Tcl 8.6
+package require Tcl 8.6-
 #                                       ;# Tcllib
 package require debug                   ;# - Narrative Tracing
 package require debug::caller           ;#
