Hi,

Try calling  perl Makefile.PL -DTCL_LIB_FILE=tcl86t.lib

While this is not an issue with ExtUtils::MakeMaker itself, still a good idea to keep it current

This is a bug in VKON/Tcl-1.05/Makefile.PL , it is not retrieving TCL_LIB_FILE= value from C:/ActiveTcl/lib/tclConfig.sh , which ought to be tcl86t.lib

Maybe TCL_LIB_FILE value wasn't available before , but its available know. You should report this bug to VKON ( bug-Tcl@rt.cpan.org ) and reference this thread