diff --git a/README.md b/README.md
index 69e01e5..41add72 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,14 @@ A simple little "land" to run webassembly programs in.
 
 ## Building
 
-First, install [tup](http://gittup.org/tup/index.html).
+### System dependencies
+
+All should be the most modern or git head releases.
+
+- [tup](https://gittup.org/tup)
+- [wabt](https://github.com/WebAssembly/wabt)
+- [Go](https://golang.org)
+- [wasmception](https://github.com/yurydelendik/wasmception) (must be checked out and built at ~/code/wasmception for now, sorry)
 
 ### I have FUSE