Forgot to check in toys.h when generated/oldtoys.h went in. (Oops.)
diff --git a/toys.h b/toys.h
index 019c1b5..2ce1d0a 100644
--- a/toys.h
+++ b/toys.h
@@ -63,6 +63,7 @@
 #define NEWTOY(name, opts, flags) void name##_main(void);
 #define OLDTOY(name, oldname, opts, flags)
 #include "generated/newtoys.h"
+#include "generated/oldtoys.h"
 #include "generated/globals.h"
 
 // These live in main.c