<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-language-coq"> <title>Coq</title> <para> Coq libraries should be installed in <literal>$(out)/lib/coq/${coq.coq-version}/user-contrib/</literal>. Such directories are automatically added to the <literal>$COQPATH</literal> environment variable by the hook defined in the Coq derivation. </para> <para> Some extensions (plugins) might require OCaml and sometimes other OCaml packages. The <literal>coq.ocamlPackages</literal> attribute can be used to depend on the same package set Coq was built against. </para> <para> Coq libraries may be compatible with some specific versions of Coq only. The <literal>compatibleCoqVersions</literal> attribute is used to precisely select those versions of Coq that are compatible with this derivation. </para> <para> Here is a simple package example. It is a pure Coq library, thus it depends on Coq. It builds on the Mathematical Components library, thus it also takes <literal>mathcomp</literal> as <literal>buildInputs</literal>. Its <literal>Makefile</literal> has been generated using <literal>coq_makefile</literal> so we only have to set the <literal>$COQLIB</literal> variable at install time. </para> <programlisting> { stdenv, fetchFromGitHub, coq, mathcomp }: stdenv.mkDerivation rec { name = "coq${coq.coq-version}-multinomials-${version}"; version = "1.0"; src = fetchFromGitHub { owner = "math-comp"; repo = "multinomials"; rev = version; sha256 = "1qmbxp1h81cy3imh627pznmng0kvv37k4hrwi2faa101s6bcx55m"; }; buildInputs = [ coq ]; propagatedBuildInputs = [ mathcomp ]; installFlags = "COQLIB=$(out)/lib/coq/${coq.coq-version}/"; meta = { description = "A Coq/SSReflect Library for Monoidal Rings and Multinomials"; inherit (src.meta) homepage; license = stdenv.lib.licenses.cecill-b; inherit (coq.meta) platforms; }; passthru = { compatibleCoqVersions = v: builtins.elem v [ "8.5" "8.6" "8.7" ]; }; } </programlisting> </section>