Document the static build procedure in README

README.md

@@ -79,6 +79,18 @@ Finally, you can build the latest development version with:
 opam pin add git+https://github.com/PataphysicalSociety/soupault
 ```
 
+To build static binaries, you need to install OCaml with musl runtime,
+then use the `static` Dune profile:
+
+```
+# For OCaml 4.12.2, adjust for your desired version
+opam switch create 4.14.2-musl ocaml-variants.4.14.2+options ocaml-option-musl ocaml-option-static
+opam switch 4.14.2-musl
+
+# Build static binaries
+dune build --profile=static
+```
+
 # Contributing
 
 Bug reports and patches are always welcome. Feature requests and new features are also welcome,