diff --git a/pkgs/development/python-modules/isoduration/default.nix b/pkgs/development/python-modules/isoduration/default.nix
new file mode 100644
index 000000000000..16bb9b13bf83
--- /dev/null
+++ b/pkgs/development/python-modules/isoduration/default.nix
@@ -0,0 +1,50 @@
+{ lib
+, arrow
+, buildPythonPackage
+, fetchFromGitHub
+, hypothesis
+, isodate
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "isoduration";
+  version = "20.11.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "bolsote";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-6LqsH+3V/K0s2YD1gvmelo+cCH+yCAmmyTYGhUegVdk=";
+  };
+
+  propagatedBuildInputs = [
+    arrow
+  ];
+
+  checkInputs = [
+    hypothesis
+    isodate
+    pytestCheckHook
+  ];
+
+  disabledTestPaths = [
+    # We don't care about benchmarks
+    "tests/test_benchmark.py"
+  ];
+
+  pythonImportsCheck = [
+    "isoduration"
+  ];
+
+  meta = with lib; {
+    description = "Library for operations with ISO 8601 durations";
+    homepage = "https://github.com/bolsote/isoduration";
+    license = licenses.isc;
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 76c82ab21617..bd22d298b578 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4229,6 +4229,8 @@ in {
 
   isodate = callPackage ../development/python-modules/isodate { };
 
+  isoduration = callPackage ../development/python-modules/isoduration { };
+
   isort = callPackage ../development/python-modules/isort { };
 
   isounidecode = callPackage ../development/python-modules/isounidecode { };