diff --git a/pkgs/development/ocaml-modules/angstrom-async/default.nix b/pkgs/development/ocaml-modules/angstrom-async/default.nix
new file mode 100644
index 000000000000..ac900a8dd186
--- /dev/null
+++ b/pkgs/development/ocaml-modules/angstrom-async/default.nix
@@ -0,0 +1,19 @@
+{ stdenv, fetchFromGitHub, buildDunePackage, angstrom, async }:
+
+buildDunePackage rec {
+  pname = "angstrom-async";
+
+  inherit (angstrom) version src;
+
+  minimumOCamlVersion = "4.04.1";
+
+  propagatedBuildInputs = [ angstrom async ];
+
+  doCheck = true;
+
+  meta = {
+    inherit (angstrom.meta) homepage license;
+    description = "Async support for Angstrom";
+    maintainers = with stdenv.lib.maintainers; [ romildo ];
+  };
+}
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/development/ocaml-modules/angstrom-unix/default.nix b/pkgs/development/ocaml-modules/angstrom-unix/default.nix
new file mode 100644
index 000000000000..0d4ab400dd3e
--- /dev/null
+++ b/pkgs/development/ocaml-modules/angstrom-unix/default.nix
@@ -0,0 +1,19 @@
+{ stdenv, fetchFromGitHub, buildDunePackage, angstrom }:
+
+buildDunePackage rec {
+  pname = "angstrom-unix";
+
+  inherit (angstrom) version src;
+
+  minimumOCamlVersion = "4.03";
+
+  propagatedBuildInputs = [ angstrom ];
+
+  doCheck = true;
+
+  meta = {
+    inherit (angstrom.meta) homepage license;
+    description = "Unix support for Angstrom";
+    maintainers = with stdenv.lib.maintainers; [ romildo ];
+  };
+}
diff --git a/pkgs/development/ocaml-modules/angstrom/default.nix b/pkgs/development/ocaml-modules/angstrom/default.nix
index 2bb717168ad7..af12ea544cc8 100644
--- a/pkgs/development/ocaml-modules/angstrom/default.nix
+++ b/pkgs/development/ocaml-modules/angstrom/default.nix
@@ -2,7 +2,7 @@
 
 buildDunePackage rec {
   pname = "angstrom";
-  version = "0.10.0";
+  version = "0.12.1";
 
   minimumOCamlVersion = "4.03";
 
@@ -10,7 +10,7 @@ buildDunePackage rec {
     owner  = "inhabitedtype";
     repo   = pname;
     rev    = version;
-    sha256 = "0lh6024yf9ds0nh9i93r9m6p5psi8nvrqxl5x7jwl13zb0r9xfpw";
+    sha256 = "0w0wavqzdy2hrh7cjyl9w72ad4vndhwhknwvyacvkwkja5wys5b2";
   };
 
   buildInputs = [ alcotest ];
diff --git a/pkgs/development/ocaml-modules/earlybird/default.nix b/pkgs/development/ocaml-modules/earlybird/default.nix
new file mode 100644
index 000000000000..1a98c748e456
--- /dev/null
+++ b/pkgs/development/ocaml-modules/earlybird/default.nix
@@ -0,0 +1,24 @@
+{ lib, fetchurl, buildDunePackage, angstrom, angstrom-lwt-unix,
+  batteries, cmdliner, lwt_ppx, ocaml_lwt, ppx_deriving_yojson,
+  ppx_tools_versioned, yojson }:
+
+buildDunePackage rec {
+  pname = "earlybird";
+  version = "0.1.5";
+
+  minimumOCamlVersion = "4.04";
+
+  src = fetchurl {
+    url = "https://github.com/hackwaly/ocamlearlybird/releases/download/${version}/${pname}-${version}.tbz";
+    sha256 = "10yflmsicw4sdmm075zjpbmxpwm9fvibnl3sl18zjpwnm6l9sv7d";
+  };
+
+  buildInputs = [ angstrom angstrom-lwt-unix batteries cmdliner lwt_ppx ocaml_lwt ppx_deriving_yojson ppx_tools_versioned yojson ];
+
+  meta = {
+    homepage = "https://github.com/hackwaly/ocamlearlybird";
+    description = "OCaml debug adapter";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.romildo ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index f2baa2b2a9ee..ed33c2b6415f 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -20,6 +20,12 @@ let
 
     angstrom = callPackage ../development/ocaml-modules/angstrom { };
 
+    angstrom-async = callPackage ../development/ocaml-modules/angstrom-async { };
+
+    angstrom-lwt-unix = callPackage ../development/ocaml-modules/angstrom-lwt-unix { };
+
+    angstrom-unix = callPackage ../development/ocaml-modules/angstrom-unix { };
+
     ansiterminal = callPackage ../development/ocaml-modules/ansiterminal { };
 
     apron = callPackage ../development/ocaml-modules/apron { };
@@ -225,6 +231,8 @@ let
 
     earley = callPackage ../development/ocaml-modules/earley { };
 
+    earlybird = callPackage ../development/ocaml-modules/earlybird { };
+
     easy-format = callPackage ../development/ocaml-modules/easy-format { };
 
     elina = callPackage ../development/ocaml-modules/elina { };