@@ -92,8 +92,12 @@ $(2)_DL_ENV += \
$$($(2)_GO_ENV)
# Due to vendoring, it is pretty likely that not all licenses are
-# listed in <pkg>_LICENSE.
+# listed in <pkg>_LICENSE. If the license is unset, it is "unknown"
+# so adding unknowns to some unknown is still some other unkown,
+# so don't append the blurb in that case.
+ifneq ($$($(2)_LICENSE),)
$(2)_LICENSE += , vendored dependencies licenses probably not listed
+endif
# Build step. Only define it if not already defined by the package .mk
# file.