diff --git a/pkgs/development/python-modules/onnxconverter-common/default.nix b/pkgs/development/python-modules/onnxconverter-common/default.nix
new file mode 100644
index 000000000000..89fefb38dee0
--- /dev/null
+++ b/pkgs/development/python-modules/onnxconverter-common/default.nix
@@ -0,0 +1,48 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, numpy
+, packaging
+, protobuf
+, onnx
+, unittestCheckHook
+, onnxruntime
+}:
+
+buildPythonPackage {
+  pname = "onnxconverter-common";
+  version = "1.12.2"; # Upstream no longer seems to push tags
+
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "microsoft";
+    repo = "onnxconverter-common";
+    rev = "814cdf494d987900d30b16971c0e8334aaca9ae6";
+    hash = "sha256-XA/kl8aT1wLthl1bMihtv/1ELOW1sGO/It5XfJtD+sY=";
+  };
+
+  propagatedBuildInputs = [
+    numpy
+    packaging # undeclared dependency
+    protobuf
+    onnx
+  ];
+
+  checkInputs = [
+    onnxruntime
+    unittestCheckHook
+  ];
+
+  unittestFlagsArray = [ "-s" "tests" ];
+
+  # Failing tests
+  # https://github.com/microsoft/onnxconverter-common/issues/242
+  doCheck = false;
+
+  meta = {
+    description = "ONNX Converter and Optimization Tools";
+    maintainers = with lib.maintainers; [ fridh ];
+    license = with lib.licenses; [ mit ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f2ce500f8088..e16e0d339f54 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6388,6 +6388,8 @@ in {
 
   onnx = callPackage ../development/python-modules/onnx { };
 
+  onnxconverter-common = callPackage ../development/python-modules/onnxconverter-common { };
+
   onnxruntime = (toPythonModule (pkgs.onnxruntime.override {
     python3Packages = self;
     pythonSupport = true;