diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 35bda1de6f33..f9769350ab12 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -756,6 +756,24 @@ in {
     };
   };
 
+  aniso8601 = buildPythonPackage rec {
+    name = "aniso8601-${version}";
+    version = "1.2.0";
+ 
+    meta = {
+      description = "Parses ISO 8601 strings.";
+      homepage    = "https://bitbucket.org/nielsenb/aniso8601";
+      license     = licenses.bsd3;
+    };
+ 
+    propagatedBuildInputs = with self; [ dateutil ];
+ 
+    src = pkgs.fetchurl {
+      url = "mirror://pypi/a/aniso8601/${name}.tar.gz";
+      sha256 = "502400f82574afa804cc915d83f15c67533d364dcd594f8a6b9d2053f3404dd4";
+    };
+  };
+
   asgiref = buildPythonPackage rec {
     name = "asgiref-${version}";
     version = "1.0.0";