Index: library/safe.tcl
--- library/safe.tcl.orig
+++ library/safe.tcl
@@ -344,6 +344,8 @@ proc ::safe::InterpSetConfig {slave access_path static
 	    # Prevent the addition of dirs on the tm list to the
 	    # result if they are already known.
 	    if {[dict exists $remap_access_path $dir]} {
+		# The dir must nevertheless be added to the slave's tm_path. Bug [eb268f246f].
+		lappend slave_tm_path [dict get $remap_access_path $dir]
 		continue
 	    }