diff --git a/pkgs/development/python-modules/karton-asciimagic/default.nix b/pkgs/development/python-modules/karton-asciimagic/default.nix
new file mode 100644
index 000000000000..f62e602896b3
--- /dev/null
+++ b/pkgs/development/python-modules/karton-asciimagic/default.nix
@@ -0,0 +1,42 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, karton-core
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "karton-asciimagic";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "CERT-Polska";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0yvd0plpwy5qkd2jljpd6wm6dlj2g8csvj1q2md23vsgx7h7v2vm";
+  };
+
+  propagatedBuildInputs = [
+    karton-core
+  ];
+
+  postPatch = ''
+    substituteInPlace requirements.txt \
+      --replace "karton.core==4.0.5" "karton-core"
+  '';
+
+  checkPhase = ''
+    runHook preCheck
+    ${python.interpreter} -m unittest discover
+    runHook postCheck
+  '';
+
+  pythonImportsCheck = [ "karton.asciimagic" ];
+
+  meta = with lib; {
+    description = "Decoders for ascii-encoded executables for the Karton framework";
+    homepage = "https://github.com/CERT-Polska/karton-asciimagic";
+    license = with licenses; [ bsd3 ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index bf5777629be7..d4bc95f32024 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3675,6 +3675,8 @@ in {
 
   kaptan = callPackage ../development/python-modules/kaptan { };
 
+  karton-asciimagic = callPackage ../development/python-modules/karton-asciimagic { };
+
   karton-classifier = callPackage ../development/python-modules/karton-classifier { };
 
   karton-core = callPackage ../development/python-modules/karton-core { };