Index: modules/map/track-entry.tcl
--- modules/map/track-entry.tcl.orig
+++ modules/map/track-entry.tcl
@@ -48,7 +48,7 @@ package provide map::track::entry 0.1
 # # ## ### ##### ######## ############# ######################
 ## Requirements
 
-package require Tcl 8.6
+package require Tcl 8.6-
 #                                       ;# Tcllib
 package require debug                   ;# - Narrative Tracing
 package require debug::caller           ;#
