diff --git a/pkgs/development/python-modules/nsz/default.nix b/pkgs/development/python-modules/nsz/default.nix
new file mode 100644
index 000000000000..c165e850de0c
--- /dev/null
+++ b/pkgs/development/python-modules/nsz/default.nix
@@ -0,0 +1,30 @@
+{ lib, buildPythonPackage, fetchFromGitHub, pycryptodome, enlighten, zstandard
+, withGUI ? true
+, kivy
+}:
+
+buildPythonPackage rec {
+  pname = "nsz";
+  version = "4.1.0";
+
+  src = fetchFromGitHub {
+    owner = "nicoboss";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-tdngXV+VUOAkg3lF2NOmw0mBeSEE+YpUfuKukTKcPnM=";
+  };
+
+  propagatedBuildInputs = [pycryptodome enlighten zstandard ]
+    ++ lib.optional withGUI kivy;
+
+  # do not check, as nsz requires producation keys
+  # dumped from a Nintendo Switch.
+  doCheck = false;
+
+  meta = with lib; {
+    homepage = "https://github.com/nicoboss/nsz";
+    description = "NSZ - Homebrew compatible NSP/XCI compressor/decompressor";
+    license = licenses.mit;
+    maintainers = with maintainers; [ eyjhb ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 843fb9626744..cda60e5f2dbc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4652,6 +4652,8 @@ with pkgs;
 
   nsync = callPackage ../development/libraries/nsync { };
 
+  nsz = with python3.pkgs; toPythonApplication nsz;
+
   nwipe = callPackage ../tools/security/nwipe { };
 
   nx2elf = callPackage ../tools/compression/nx2elf { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 30548a9af37f..1cb1cc255951 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6287,6 +6287,8 @@ self: super: with self; {
 
   nvidia-ml-py = callPackage ../development/python-modules/nvidia-ml-py { };
 
+  nsz = callPackage ../development/python-modules/nsz { };
+
   nxt-python = callPackage ../development/python-modules/nxt-python { };
 
   python-nvd3 = callPackage ../development/python-modules/python-nvd3 { };