Document host TLS runtime library

ober

ef2e4dec6576afb2df89ffaf179f2d930dde4d3e

diff --git a/README.md b/README.md
index 3eeb601..2d84b7d 100644
--- a/README.md
+++ b/README.md
@@ -22,10 +22,10 @@ The Makefile uses `~/mine/jerboa` by default. Override with `JERBOA_HOME=/path/t
 
 ```sh
 make binary
-TLS_CERT=/path/fullchain.pem TLS_KEY=/path/privkey.pem PORT=8443 ./dist/jerboa-sinatra-site
+DYLD_LIBRARY_PATH=$HOME/mine/jerboa/lib TLS_CERT=/path/fullchain.pem TLS_KEY=/path/privkey.pem PORT=8443 ./dist/jerboa-sinatra-site
 ```
 
-For a fully static Linux amd64 binary:
+The host binary is self-contained for Chez/Jerboa code, but uses Jerboa's dynamic rustls native library on macOS. For a fully static Linux amd64 binary:
 
 ```sh
 make static-binary