I think this would have helped avoid a recent mistake I made in
games/freeorion.

boost_python${MODPY_MAJORMINOR} aka boost_python${MODPY_VERSION:C/\.//g}
could perhaps also be handled, but before I spend time on figuring out
how let's see if there's a reason not to do the simple thing:

Index: python.port.mk
===================================================================
RCS file: /cvs/ports/lang/python/3/python.port.mk,v
diff -u -p -r1.25 python.port.mk
--- python.port.mk	16 Mar 2026 22:28:04 -0000	1.25
+++ python.port.mk	15 May 2026 10:12:23 -0000
@@ -255,6 +255,9 @@ SUBST_VARS :=	MODPY_PYCACHE MODPY_ABI3SO
 		MODPY_BIN MODPY_DISTV MODPY_VERSION \
 		MODPY_PY_PREFIX MODPY_PYOEXTENSION ${SUBST_VARS}
 
+CHECK_LIB_DEPENDS_ARGS += \
+	-S MODPY_WANTLIB="${MODPY_WANTLIB}"
+
 UPDATE_PLIST_ARGS += \
 	-S MODPY_PYOEXTENSION