diff --git a/pkgs/development/ocaml-modules/angstrom-lwt-unix/default.nix b/pkgs/development/ocaml-modules/angstrom-lwt-unix/default.nix
new file mode 100644
index 000000000000..d249c4512914
--- /dev/null
+++ b/pkgs/development/ocaml-modules/angstrom-lwt-unix/default.nix
@@ -0,0 +1,19 @@
+{ stdenv, fetchFromGitHub, buildDunePackage, angstrom, ocaml_lwt }:
+
+buildDunePackage rec {
+  pname = "angstrom-lwt-unix";
+
+  inherit (angstrom) version src;
+
+  minimumOCamlVersion = "4.03";
+
+  propagatedBuildInputs = [ angstrom ocaml_lwt ];
+
+  doCheck = true;
+
+  meta = {
+    inherit (angstrom.meta) homepage license;
+    description = "Lwt_unix support for Angstrom";
+    maintainers = with stdenv.lib.maintainers; [ romildo ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index ca2de5b0d3ee..3d660a0edda3 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -22,6 +22,8 @@ let
 
     angstrom-async = callPackage ../development/ocaml-modules/angstrom-async { };
 
+    angstrom-lwt-unix = callPackage ../development/ocaml-modules/angstrom-lwt-unix { };
+
     ansiterminal = callPackage ../development/ocaml-modules/ansiterminal { };
 
     apron = callPackage ../development/ocaml-modules/apron { };