diff --git a/readme b/readme
index c5bb03a..3857b77 100644
--- a/readme
+++ b/readme
@@ -1,5 +1,8 @@
 horny desktop pet thing.
 
+you need sdl3 to build it.
+i have not tried cross-compiling to windows yet.
+
 i think it's probably best to use some sort of extension language.
 i want people to be able to create their own pets without having to
 figure out how to recompile.