diff --git a/flake.nix b/flake.nix
index e9d7970..100ac8a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -38,6 +38,8 @@
           pitchcontrol = callPackage ./mpv-scripts/pitchcontrol { };
         };
 
+        nsz = callPythonPackage ./nsz { };
+
         oha = callPackage ./oha { };
 
         snownews = callPackage ./snownews { };
@@ -79,6 +81,7 @@
             cyanrip
             deemix
             face_morpher
+            nsz
             oha
             snownews
             textidote
diff --git a/nsz/default.nix b/nsz/default.nix
new file mode 100644
index 0000000..5248357
--- /dev/null
+++ b/nsz/default.nix
@@ -0,0 +1,33 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pycryptodome
+, zstandard
+, enlighten
+}:
+
+buildPythonPackage rec {
+  pname = "nsz";
+  version = "4.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1gckszvkjklrslidpfidbzcigpwwj4s0chrnrg16wvh3r93aiaci";
+  };
+
+  propagatedBuildInputs = [
+    pycryptodome
+    zstandard
+    enlighten
+  ];
+
+  doCheck = false; # requires keys
+
+  meta = with lib; {
+    description = "A homebrew compatible NSP/XCI compressor/decompressor";
+    homepage = "https://github.com/nicoboss/nsz";
+    license = licenses.mit;
+    maintainers = with maintainers; [ sbruder ];
+    platforms = platforms.all;
+  };
+}