From 50cac6ed5ed534f8a1539349863599ade91295e7 Mon Sep 17 00:00:00 2001
From: Daniel Olsen <daniel.olsen99@gmail.com>
Date: Sun, 31 Oct 2021 04:35:37 +0100
Subject: [PATCH] ocamlPackages.unix-errno: init at 0.6.1

---
 .../ocaml-modules/unix-errno/default.nix      | 22 +++++++++++++++++++
 pkgs/top-level/ocaml-packages.nix             |  2 ++
 2 files changed, 24 insertions(+)
 create mode 100644 pkgs/development/ocaml-modules/unix-errno/default.nix

diff --git a/pkgs/development/ocaml-modules/unix-errno/default.nix b/pkgs/development/ocaml-modules/unix-errno/default.nix
new file mode 100644
index 00000000000..2b8deb6621d
--- /dev/null
+++ b/pkgs/development/ocaml-modules/unix-errno/default.nix
@@ -0,0 +1,22 @@
+{ lib, buildDunePackage, fetchurl, ctypes, integers, result }:
+
+buildDunePackage rec {
+  pname = "unix-errno";
+  version = "0.6.1";
+
+  minimalOCamlVersion = "4.03.0"; # Specified to be 4.01.0, but it's actually 4.03
+
+  src = fetchurl {
+    url = "https://github.com/xapi-project/ocaml-unix-errno/releases/download/${version}/unix-errno-${version}.tbz";
+    sha256 = "sha256-jZqtHwUKTffjuOP2jdKKQRtEOBKyclhfeiPO96hEj4c=";
+  };
+
+  propagatedBuildInputs = [ ctypes integers result ];
+
+  meta = with lib; {
+    homepage = "https://github.com/xapi-project/ocaml-unix-errno"; # This is the repo used in the opam package
+    description = "Unix errno types, maps, and support for OCaml";
+    license = with licenses; [ isc lgpl21Only ]; # All the files indicate ISC, but there's an LGPL LICENSE file
+    maintainers = with maintainers; [ dandellion ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index d0c444f9680..6a31c552493 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1405,6 +1405,8 @@ let
 
     uecc = callPackage ../development/ocaml-modules/uecc { };
 
+    unix-errno = callPackage ../development/ocaml-modules/unix-errno { };
+
     utop = callPackage ../development/tools/ocaml/utop { };
 
     uuidm = callPackage ../development/ocaml-modules/uuidm { };