Adds ocaml-magic-mime

This OCaml library contains a database of MIME types that maps filename
extensions into MIME types suitable for use in many Internet protocols
such as HTTP or e-mail.

Homepage: https://github.com/mirage/ocaml-magic-mime

pkgs/development/ocaml-modules/magic-mime/default.nix

···
+{ stdenv, fetchzip, ocaml, findlib }:
+
+let version = "1.0.0"; in
+
+stdenv.mkDerivation {
+  name = "ocaml-magic-mime-${version}";
+
+  src = fetchzip {
+    url = "https://github.com/mirage/ocaml-magic-mime/archive/v${version}.tar.gz";
+    sha256 = "058d83hmxd5mjccxdm3ydchmhk2lca5jdg82jg0klsigmf4ida6v";
+  };
+
+  buildInputs = [ ocaml findlib ];
+
+  createFindlibDestdir = true;
+
+  meta = {
+    homepage = https://github.com/mirage/ocaml-magic-mime;
+    description = "Convert file extensions to MIME types";
+    platforms = ocaml.meta.platforms;
+    license = stdenv.lib.licenses.isc;
+    maintainers = with stdenv.lib.maintainers; [ vbgl ];
+  };
+}

pkgs/top-level/all-packages.nix

···
 
     macaque = callPackage ../development/ocaml-modules/macaque { };
 
+    magic-mime = callPackage ../development/ocaml-modules/magic-mime { };
+
     magick = callPackage ../development/ocaml-modules/magick { };
 
     menhir = callPackage ../development/ocaml-modules/menhir { };