diff --git a/pkgs/development/python-modules/python-fluent/fluent-runtime.nix b/pkgs/development/python-modules/python-fluent/fluent-runtime.nix
new file mode 100644
index 000000000000..1a011956ecce
--- /dev/null
+++ b/pkgs/development/python-modules/python-fluent/fluent-runtime.nix
@@ -0,0 +1,61 @@
+{
+  buildPythonPackage,
+  fetchFromGitHub,
+  lib,
+  pytestCheckHook,
+  setuptools,
+
+  # dependencies
+  attrs,
+  babel,
+  fluent-syntax,
+  pytz,
+  typing-extensions,
+}:
+
+let
+  version = "0.4.0";
+
+  src = fetchFromGitHub {
+    owner = "projectfluent";
+    repo = "python-fluent";
+    rev = "fluent.runtime@${version}";
+    hash = "sha256-Crg6ybweOZ4B3WfLMOcD7+TxGEZPTHJUxr8ItLB4G+Y=";
+  };
+in
+buildPythonPackage {
+  pname = "fluent-runtime";
+  inherit version;
+  pyproject = true;
+
+  inherit src;
+  sourceRoot = "${src.name}/fluent.runtime";
+
+  build-system = [ setuptools ];
+
+  dependencies = [
+    attrs
+    babel
+    fluent-syntax
+    pytz
+    typing-extensions
+  ];
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  disabledTests = [
+    # https://github.com/projectfluent/python-fluent/pull/203
+    "test_timeZone"
+  ];
+
+  pythonImportsCheck = [ "fluent.runtime" ];
+
+  meta = {
+    changelog = "https://github.com/projectfluent/python-fluent/blob/${src.rev}/fluent.runtime/CHANGELOG.rst";
+    description = "Localization library for expressive translations";
+    downloadPage = "https://github.com/projectfluent/python-fluent/releases/tag/${src.rev}";
+    homepage = "https://projectfluent.org/python-fluent/fluent.runtime/${version}";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ getpsyched ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index e617ab3d21cd..c9061f0a9097 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4510,6 +4510,8 @@ self: super: with self; {
 
   fluent-logger = callPackage ../development/python-modules/fluent-logger { };
 
+  fluent-runtime = callPackage ../development/python-modules/python-fluent/fluent-runtime.nix { };
+
   fluent-syntax = callPackage ../development/python-modules/python-fluent/fluent-syntax.nix { };
 
   flufl-bounce = callPackage ../development/python-modules/flufl/bounce.nix { };