diff --git a/nix/cbor2.nix b/nix/cbor2.nix
new file mode 100644
index 000000000..02c810e1e
--- /dev/null
+++ b/nix/cbor2.nix
@@ -0,0 +1,18 @@
+{ lib, buildPythonPackage, fetchPypi }:
+buildPythonPackage rec {
+  pname = "cbor2";
+  version = "5.2.0";
+
+  src = fetchPypi {
+    sha256 = "1mmmncfbsx7cbdalcrsagp9hx7wqfawaz9361gjkmsk3lp6chd5w";
+    inherit pname version;
+  };
+
+  doCheck = false;
+
+  meta = with lib; {
+    homepage = https://github.com/agronholm/cbor2;
+    description = "CBOR encoder/decoder";
+    license = licenses.mit;
+  };
+}
diff --git a/nix/overlays.nix b/nix/overlays.nix
index 011d8dd6b..5cfab200c 100644
--- a/nix/overlays.nix
+++ b/nix/overlays.nix
@@ -21,6 +21,9 @@ self: super: {
 
       # collections-extended is not part of nixpkgs at this time.
       collections-extended = python-super.pythonPackages.callPackage ./collections-extended.nix { };
+
+      # cbor2 is not part of nixpkgs at this time.
+      cbor2 = python-super.pythonPackages.callPackage ./cbor2.nix { };
     };
   };