Add MODTK_BIN to SUBST_VARS; no longer added by the Tk port module.
diff -Nurp /usr/ports//misc/WordGenerator/Makefile ./Makefile
--- /usr/ports//misc/WordGenerator/Makefile Wed Jan 21 22:31:39 2026
+++ ./Makefile Sat Feb 7 10:15:57 2026
@@ -22,8 +22,8 @@ RUN_DEPENDS = devel/tcllib>=1.8 \
NO_BUILD = Yes
NO_TEST = Yes
-
PKG_ARCH = *
+SUBST_VARS = MODTK_BIN
pre-configure:
${SUBST_CMD} ${WRKSRC}/WordGenerator.tcl
