diff -ruN expat-2.7.1/conftools/config.sub expat-2.7.1-banan_os/conftools/config.sub
--- expat-2.7.1/conftools/config.sub	2022-07-27 15:26:54.000000000 +0300
+++ expat-2.7.1-banan_os/conftools/config.sub	2025-06-17 11:51:49.876848002 +0300
@@ -1775,7 +1775,7 @@
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
-	     | fiwix* )
+	     | fiwix* | banan_os* )
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)