diff --git a/pkgs/development/python-modules/pyctr/default.nix b/pkgs/development/python-modules/pyctr/default.nix
new file mode 100644
index 000000000000..3817342be3ed
--- /dev/null
+++ b/pkgs/development/python-modules/pyctr/default.nix
@@ -0,0 +1,24 @@
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
+, pycryptodomex }:
+
+buildPythonPackage rec {
+  pname = "pyctr";
+  version = "0.6.0";
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-05lMcsIeJIHI3LwHQTjr4M+bn1FG+GQscuGq34XxjK8=";
+  };
+
+  propagatedBuildInputs = [ pycryptodomex ];
+
+  pythonImportsCheck = [ "pyctr" ];
+
+  meta = with lib; {
+    description = "Python library to interact with Nintendo 3DS files";
+    license = licenses.mit;
+    maintainers = with maintainers; [ rileyinman ];
+    homepage = "https://github.com/ihaveamac/pyctr";
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 92fe13bbcc16..b2b3831e65d7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6769,6 +6769,8 @@ in {
 
   pyct = callPackage ../development/python-modules/pyct { };
 
+  pyctr = callPackage ../development/python-modules/pyctr { };
+
   pycuda = callPackage ../development/python-modules/pycuda {
     cudatoolkit = pkgs.cudatoolkit;
     inherit (pkgs.stdenv) mkDerivation;