Oops... we do want insmod support, but we don't need tape support.

sources/busybox.config

@@ -60,7 +60,7 @@ CONFIG_UNZIP=y
 #
 # Common options for cpio and tar
 #
-CONFIG_FEATURE_UNARCHIVE_TAPE=y
+# CONFIG_FEATURE_UNARCHIVE_TAPE is not set
 
 #
 # Coreutils
@@ -276,7 +276,7 @@ CONFIG_TIME=y
 #
 # Linux Module Utilities
 #
-# CONFIG_INSMOD is not set
+CONFIG_INSMOD=y
 # CONFIG_FEATURE_OLD_MODULE_INTERFACE is not set
 CONFIG_FEATURE_NEW_MODULE_INTERFACE=y