diff --git a/README.md b/README.md
index 17febb3..0ca3219 100644
--- a/README.md
+++ b/README.md
@@ -12,12 +12,16 @@ way of iterating on a finite number of values, only allocating (most of the time
 one intermediate closure to do so. For instance, iterating on keys, or values,
 of a `Hashtbl.t`, without creating a list.
 
+Documentation
+=============
+
+See [the online API](http://cedeela.fr/~simon/software/sequence/Sequence.html).
+
 Build
 =====
 
-You need OCaml, say OCaml 3.12 or OCaml 4.0.
-
-    $ make
+1. via opam `opam install sequence`
+2. manually (need OCaml >= 3.12): `make all install`
 
 If you have `OUnit` installed, you can build and run tests with
 
@@ -40,11 +44,6 @@ The module `examples/sexpr.mli` exposes the interface of the S-expression
 example library. It requires OCaml>=4.0 to compile, because of the GADT
 structure used in the monadic parser combinators part of `examples/sexpr.ml`.
 
-Documentation
-=============
-
-See [the online API](http://cedeela.fr/~simon/software/sequence/Sequence.html).
-
 License
 =======