diff --git a/pkgs/development/python-modules/cwl-upgrader/default.nix b/pkgs/development/python-modules/cwl-upgrader/default.nix
new file mode 100644
index 00000000000..1c63c6605da
--- /dev/null
+++ b/pkgs/development/python-modules/cwl-upgrader/default.nix
@@ -0,0 +1,53 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytest-xdist
+, pytestCheckHook
+, pythonOlder
+, ruamel-yaml
+, schema-salad
+}:
+
+buildPythonPackage rec {
+  pname = "cwl-upgrader";
+  version = "1.2.4";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "common-workflow-language";
+    repo = pname;
+    rev = "refs/tags/v${version}";
+    hash = "sha256-3pKnkU8lks3w+N7w2qST9jr4/CS6YzgnBVLTlgq1gf0=";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "ruamel.yaml >= 0.15, < 0.17.22" "ruamel.yaml" \
+      --replace "setup_requires=PYTEST_RUNNER," ""
+    sed -i "/ruamel.yaml/d" setup.py
+  '';
+
+  propagatedBuildInputs = [
+    ruamel-yaml
+    schema-salad
+  ];
+
+  checkInputs = [
+    pytest-xdist
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "cwlupgrader"
+  ];
+
+  meta = with lib; {
+    description = "Library to interface with Yolink";
+    homepage = "https://github.com/common-workflow-language/cwl-utils";
+    changelog = "https://github.com/common-workflow-language/cwl-utils/releases/tag/v${version}";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b4b340a42ba..72cc04a90b2 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2124,6 +2124,8 @@ self: super: with self; {
 
   cwcwidth = callPackage ../development/python-modules/cwcwidth { };
 
+  cwl-upgrader = callPackage ../development/python-modules/cwl-upgrader { };
+
   cx_Freeze = callPackage ../development/python-modules/cx_freeze { };
 
   cx_oracle = callPackage ../development/python-modules/cx_oracle { };