diff --git a/flake.nix b/flake.nix
index 160bccc..b7d6fe2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -331,6 +331,7 @@
         brassica = pkgs.callPackage packages/brassica.nix {};
         cheat-sh = pkgs.callPackage packages/cheat-sh.nix {};
         closest = pkgs.callPackage packages/closest {};
+        cltk = pkgs.python3Packages.callPackage packages/cltk.nix {};
         cro = pkgs.callPackage packages/cro.nix {};
         cyberlocker-tools = pkgs.callPackage packages/cyberlocker-tools.nix {};
         default-gateway = pkgs.callPackage packages/default-gateway.nix {};
diff --git a/packages/cltk.nix b/packages/cltk.nix
new file mode 100644
index 0000000..4a96ed5
--- /dev/null
+++ b/packages/cltk.nix
@@ -0,0 +1,61 @@
+{ buildPythonPackage, lib, fetchPypi, gitpython, gensim, tqdm, torch, stringcase, stanza, spacy, scipy, scikit-learn, requests, rapidfuzz, pyyaml, nltk, boltons, poetry-core }:
+let
+  greek-accentuation = buildPythonPackage rec {
+    pname = "greek-accentuation";
+    version = "1.2.0";
+    src = fetchPypi {
+      inherit pname version;
+      hash = "sha256-l2HZXdqlLubvy2bWhhZVYGMpF0DXVKTDFehkcGF5xdk=";
+    };
+    meta = with lib; {
+      description = "Python 3 library for accenting (and analyzing the accentuation of) Ancient Greek words";
+      homepage = "https://github.com/jtauber/greek-accentuation";
+      license = licenses.mit;
+      maintainers = with maintainers; [ kmein ];
+    };
+  };
+in
+buildPythonPackage rec {
+  pname = "cltk";
+  format = "pyproject";
+  version = "1.3.0";
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-jAxvToUIo333HSVQDYVyUBY3YP+m1RnlNGelcvktp6s=";
+  };
+
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace "poetry>=1.1.13" poetry-core \
+      --replace "poetry.masonry.api" "poetry.core.masonry.api" \
+      --replace 'scipy = "<1.13.0"' 'scipy = "^1"' \
+      --replace 'boltons = "^21.0.0"' 'boltons = "^24.0.0"'
+  '';
+
+  propagatedBuildInputs = [
+    gitpython
+    gensim
+    boltons
+    greek-accentuation
+    pyyaml
+    nltk
+    rapidfuzz
+    requests
+    scikit-learn
+    scipy
+    spacy
+    stanza
+    stringcase
+    torch
+    tqdm
+  ];
+
+  nativeBuildInputs = [ poetry-core ];
+
+  meta = with lib; {
+    description = "Natural language processing (NLP) framework for pre-modern languages";
+    homepage = "https://cltk.org";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kmein ];
+  };
+}