diff --git a/pkgs/development/python-modules/pyhacrf-datamade/default.nix b/pkgs/development/python-modules/pyhacrf-datamade/default.nix
new file mode 100644
index 000000000000..db850e5809ff
--- /dev/null
+++ b/pkgs/development/python-modules/pyhacrf-datamade/default.nix
@@ -0,0 +1,71 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  unstableGitUpdater,
+
+  # build-system
+  cython,
+  numpy,
+  setuptools,
+
+  # dependencies
+  dedupe-pylbfgs,
+
+  # tests
+  pytestCheckHook,
+}:
+
+buildPythonPackage {
+  pname = "pyhacrf-datamade";
+  # Tagged release requested upstream in https://github.com/dedupeio/pyhacrf/issues/57
+  version = "0.2.8-unstable-2025-05-16";
+  pyproject = true;
+
+  # NOTE: This is a fork of dirko/pyhacrf maintained by dedupeio
+  src = fetchFromGitHub {
+    owner = "dedupeio";
+    repo = "pyhacrf";
+    rev = "899aa6c2c48e5afe8fb40727ffd6070e4ba71c31";
+    hash = "sha256-MVkOChDblu7A/ve51SYqO7lNoTXwh37bHjnZd+NvzK0=";
+  };
+
+  build-system = [
+    cython
+    numpy
+    setuptools
+  ];
+
+  dependencies = [
+    dedupe-pylbfgs
+    numpy
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  # Change to temp directory so pytest imports from installed package in $out, not source
+  preCheck = ''
+    export TEST_DIR=$(mktemp -d)
+    cp -r pyhacrf/tests $TEST_DIR/
+    pushd $TEST_DIR
+  '';
+
+  postCheck = ''
+    popd
+  '';
+
+  pythonImportsCheck = [
+    "pyhacrf"
+  ];
+
+  passthru.updateScript = unstableGitUpdater { };
+
+  meta = {
+    description = "Hidden alignment conditional random field for classifying string pairs";
+    homepage = "https://github.com/dedupeio/pyhacrf";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ daniel-fahey ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 5c331334d060..f568dda5a799 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -13187,6 +13187,8 @@ self: super: with self; {
 
   pygtrie = callPackage ../development/python-modules/pygtrie { };
 
+  pyhacrf-datamade = callPackage ../development/python-modules/pyhacrf-datamade { };
+
   pyhamcrest = callPackage ../development/python-modules/pyhamcrest { };
 
   pyhanko = callPackage ../development/python-modules/pyhanko { };