unikernel/duniverse/dune_/doc/howto/install-dune.rst

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+How to Install Dune
+===================
+
+Dune is available as an Opam package. First, make sure that Opam is installed:
+
+  .. code:: console
+
+   $ opam --version
+   2.1.5
+
+Any version higher than 2.0.0 is supported, though preferably at least 2.1.0.
+
+If Opam is not available, follow `the official instructions on the Opam website
+<https://opam.ocaml.org/doc/Install.html>`_ to install it and then run its
+global setup with ``opam init``.
+
+.. note::
+
+   Opam requires a "shell hook" to work properly. Make sure to set it up
+   correctly during ``opam init``. Otherwise you will have to run ``eval $(opam
+   env)`` every time you create an Opam switch or change directory.
+
+Then, you can install Dune in an Opam switch using the following command:
+
+.. code:: console
+
+  $ opam install dune
+
+After the command completes, the following should display a version number:
+
+.. code:: console
+
+  $ dune --version
+  3.12.1
+
+.. note::
+
+   In most cases, when using Opam you will not need to install Dune by hand.
+   Installing the project's dependencies will install it in the Opam switch.