diff --git a/pkgs/by-name/im/immich-machine-learning/package.nix b/pkgs/by-name/im/immich-machine-learning/package.nix
index c42e1b6009bd..e9f74898a776 100644
--- a/pkgs/by-name/im/immich-machine-learning/package.nix
+++ b/pkgs/by-name/im/immich-machine-learning/package.nix
@@ -25,9 +25,12 @@ python.pkgs.buildPythonApplication rec {
 
   pythonRelaxDeps = [
     "pydantic-settings"
+  ];
+
+  pythonRemoveDeps = [
+    # https://github.com/immich-app/immich/pull/13762
     "setuptools"
   ];
-  pythonRemoveDeps = [ "opencv-python-headless" ];
 
   build-system = with python.pkgs; [
     poetry-core
@@ -38,7 +41,7 @@ python.pkgs.buildPythonApplication rec {
     with python.pkgs;
     [
       insightface
-      opencv4
+      opencv-python-headless
       pillow
       fastapi
       uvicorn
@@ -47,7 +50,6 @@ python.pkgs.buildPythonApplication rec {
       aiocache
       rich
       ftfy
-      setuptools
       python-multipart
       orjson
       gunicorn
diff --git a/pkgs/by-name/op/open-webui/package.nix b/pkgs/by-name/op/open-webui/package.nix
index e401e72d0ff3..b2b92282dc38 100644
--- a/pkgs/by-name/op/open-webui/package.nix
+++ b/pkgs/by-name/op/open-webui/package.nix
@@ -55,10 +55,6 @@ python3.pkgs.buildPythonApplication rec {
   pythonRelaxDeps = true;
 
   pythonRemoveDeps = [
-    # using `opencv4`
-    "opencv-python-headless"
-    # using `psycopg2` instead
-    "psycopg2-binary"
     "docker"
     "pytest"
     "pytest-docker"
@@ -97,14 +93,14 @@ python3.pkgs.buildPythonApplication rec {
     markdown
     nltk
     openai
-    opencv4
+    opencv-python-headless
     openpyxl
     pandas
     passlib
     peewee
     peewee-migrate
     psutil
-    psycopg2
+    psycopg2-binary
     pydub
     pyjwt
     pymilvus
diff --git a/pkgs/development/python-modules/easyocr/default.nix b/pkgs/development/python-modules/easyocr/default.nix
index a1ff17f2b360..a75434c018ae 100644
--- a/pkgs/development/python-modules/easyocr/default.nix
+++ b/pkgs/development/python-modules/easyocr/default.nix
@@ -2,10 +2,10 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
   hdf5,
   numpy,
-  onnx,
-  opencv4,
+  opencv-python-headless,
   pillow,
   pyaml,
   pyclipper,
@@ -16,12 +16,13 @@
   shapely,
   torch,
   torchvision,
+  python,
 }:
 
 buildPythonPackage rec {
   pname = "easyocr";
   version = "1.7.2";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -32,16 +33,22 @@ buildPythonPackage rec {
     hash = "sha256-9mrAxt2lphYtLW81lGO5SYHsnMnSA/VpHiY2NffD/Js=";
   };
 
-  postPatch = ''
-    substituteInPlace requirements.txt \
-      --replace "opencv-python-headless" "" \
-      --replace "ninja" ""
-  '';
+  build-system = [
+    setuptools
+  ];
 
-  propagatedBuildInputs = [
+  pythonRelaxDeps = [
+    "torchvision"
+  ];
+
+  pythonRemoveDeps = [
+    "ninja"
+  ];
+
+  dependencies = [
     hdf5
     numpy
-    opencv4
+    opencv-python-headless
     pillow
     pyaml
     pyclipper
@@ -53,7 +60,19 @@ buildPythonPackage rec {
     torchvision
   ];
 
-  nativeCheckInputs = [ onnx ];
+  checkPhase = ''
+    runHook preCheck
+
+    export HOME="$(mktemp -d)"
+    pushd unit_test
+    ${python.interpreter} run_unit_test.py --easyocr "$out/${python.sitePackages}/easyocr"
+    popd
+
+    runHook postCheck
+  '';
+
+  # downloads detection model from the internet
+  doCheck = false;
 
   pythonImportsCheck = [ "easyocr" ];
 
diff --git a/pkgs/development/python-modules/labelbox/default.nix b/pkgs/development/python-modules/labelbox/default.nix
index 060b8d94441e..b81962cd7d9d 100644
--- a/pkgs/development/python-modules/labelbox/default.nix
+++ b/pkgs/development/python-modules/labelbox/default.nix
@@ -10,7 +10,7 @@
   nbconvert,
   nbformat,
   numpy,
-  opencv4,
+  opencv-python-headless,
   pillow,
   pydantic,
   pyproj,
@@ -45,9 +45,10 @@ buildPythonPackage rec {
 
   sourceRoot = "${src.name}/libs/labelbox";
 
-  pythonRelaxDeps = [ "python-dateutil" ];
-
-  pythonRemoveDeps = [ "opencv-python-headless" ];
+  pythonRelaxDeps = [
+    "mypy"
+    "python-dateutil"
+  ];
 
   build-system = [ hatchling ];
 
@@ -67,7 +68,7 @@ buildPythonPackage rec {
       shapely
       numpy
       pillow
-      opencv4
+      opencv-python-headless
       typeguard
       imagesize
       pyproj
diff --git a/pkgs/development/python-modules/opencv-python-headless/default.nix b/pkgs/development/python-modules/opencv-python-headless/default.nix
new file mode 100644
index 000000000000..7a379d39b879
--- /dev/null
+++ b/pkgs/development/python-modules/opencv-python-headless/default.nix
@@ -0,0 +1,14 @@
+{
+  mkPythonMetaPackage,
+  opencv4,
+}:
+
+mkPythonMetaPackage {
+  pname = "opencv-python-headless";
+  inherit (opencv4) version;
+  dependencies = [ opencv4 ];
+  optional-dependencies = opencv4.optional-dependencies or { };
+  meta = {
+    inherit (opencv4.meta) description homepage;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 95269c23ce57..9b54ba8ece45 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9376,6 +9376,8 @@ self: super: with self; {
     pythonPackages = self;
   });
 
+  opencv-python-headless = callPackage ../development/python-modules/opencv-python-headless { };
+
   openerz-api = callPackage ../development/python-modules/openerz-api { };
 
   openevsewifi = callPackage ../development/python-modules/openevsewifi { };