Change:
<ins> # OCaml {#sec-language-ocaml} OCaml libraries should be installed in `$(out)/lib/ocaml/${ocaml.version}/site-lib/`. Such directories are automatically added to the `$OCAMLPATH` environment variable when building another package that depends on them or when opening a `nix-shell`. Given that most of the OCaml ecosystem is now built with dune, nixpkgs includes a convenience build support function called `buildDunePackage` that will build an OCaml package using dune, OCaml and findlib and any additional dependencies provided as `buildInputs` or `propagatedBuildInputs`. Here is a simple package example. It defines an (optional) attribute `minimumOCamlVersion` that will be used to throw a descriptive evaluation error if building with an older OCaml is attempted. It uses the `fetchFromGitHub` fetcher to get its source. It sets the `doCheck` (optional) attribute to `true` which means that tests will be run with `dune runtest -p angstrom` after the build (`dune build -p angstrom`) is complete. It uses `alcotest` as a build input (because it is needed to run the tests) and `bigstringaf` and `result` as propagated build inputs (thus they will also be available to libraries depending on this library). The library will be installed using the `angstrom.install` file that dune generates. ```nix { stdenv , fetchFromGitHub , buildDunePackage , alcotest , result , bigstringaf }: buildDunePackage rec { pname = "angstrom"; version = "0.10.0"; minimumOCamlVersion = "4.03"; src = fetchFromGitHub { owner  = "inhabitedtype"; repo   = pname; rev    = version; sha256 = "0lh6024yf9ds0nh9i93r9m6p5psi8nvrqxl5x7jwl13zb0r9xfpw"; }; buildInputs = [ alcotest ]; propagatedBuildInputs = [ bigstringaf result ]; doCheck = true; meta = { homepage = "https://github.com/inhabitedtype/angstrom"; description = "OCaml parser combinators built for speed and memory efficiency"; license = stdenv.lib.licenses.bsd3; maintainers = with stdenv.lib.maintainers; [ sternenseemann ]; }; } ``` Here is a second example, this time using a source archive generated with `dune-release`. It is a good idea to use this archive when it is available as it will usually contain substituted variables such as a `%%VERSION%%` field. This library does not depend on any other OCaml library and no tests are run after building it. ```nix { stdenv , fetchurl , buildDunePackage }: buildDunePackage rec { pname = "wtf8"; version = "1.0.1"; minimumOCamlVersion = "4.01"; src = fetchurl { url = "https://github.com/flowtype/ocaml-${pname}/releases/download/v${version}/${pname}-${version}.tbz"; sha256 = "1msg3vycd3k8qqj61sc23qks541cxpb97vrnrvrhjnqxsqnh6ygq"; }; meta = with stdenv.lib; { homepage = "https://github.com/flowtype/ocaml-wtf8"; description = "WTF-8 is a superset of UTF-8 that allows unpaired surrogates."; license = licenses.mit; maintainers = [ maintainers.eqyiel ]; }; } ``` </ins>

Discussion:
This issue tracks the conversion of from Docbook to CommonMark per . If you intend to work on this conversion, please comment below! here that you intend to work on it. (Please also post if you stop working on it.) a new branch of nixpkgs master. : change to . to . the contents from Docbook to . Follow . Use existing sections for inspiration. from the folder to build the manual. the manual on your computer at after running from folder: it looks good, submit a PR and reference this issue.
Done!

This issue tracks the conversion of from Docbook to Commonmark per . If you intend to work on this conversion, please comment below! in this issue that you intend to work on it. (Please also post if you stop working on it) a new branch of nixpkgs master. : change to . to . the contents from Docbook to . Follow . Use existing sections for inspiration. from the folder to build the manual. the manual on your computer at after running from folder: it looks good, submit a PR and reference this issue.
Done!