diff --git a/pkgs/development/ocaml-modules/processor/default.nix b/pkgs/development/ocaml-modules/processor/default.nix
new file mode 100644
index 000000000000..4a914449251a
--- /dev/null
+++ b/pkgs/development/ocaml-modules/processor/default.nix
@@ -0,0 +1,30 @@
+{
+  lib,
+  buildDunePackage,
+  fetchFromGitHub,
+}:
+
+buildDunePackage rec {
+  pname = "processor";
+  version = "0.1";
+
+  minimalOCamlVersion = "4.08";
+
+  src = fetchFromGitHub {
+    owner = "haesbaert";
+    repo = "ocaml-processor";
+    tag = "v${version}";
+    hash = "sha256-eGSNYjVbUIUMelajqZYOd3gvmRKQ9UP3TfMflLR9i7k=";
+  };
+
+  doCheck = true;
+
+  meta = {
+    description = "CPU topology and affinity for ocaml-multicore";
+    homepage = "https://haesbaert.github.io/ocaml-processor/processor/index.html";
+    downloadPage = "https://github.com/haesbaert/ocaml-processor";
+    changelog = "https://github.com/haesbaert/ocaml-processor/releases/tag/v${version}";
+    license = lib.licenses.isc;
+    maintainers = [ lib.maintainers.ethancedwards8 ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 3286ec309efb..8286936313f0 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1780,6 +1780,8 @@ let
 
         process = callPackage ../development/ocaml-modules/process { };
 
+        processor = callPackage ../development/ocaml-modules/processor { };
+
         prometheus = callPackage ../development/ocaml-modules/prometheus { };
 
         progress = callPackage ../development/ocaml-modules/progress { };