1 files changed, 11 insertions, 2 deletions
diff --git a/pkgs/development/python-modules/ical/default.nix b/pkgs/development/python-modules/ical/default.nix
index b2d5cc0bd86c..74f444485872 100644
--- a/pkgs/development/python-modules/ical/default.nix
+++ b/pkgs/development/python-modules/ical/default.nix
@@ -13,12 +13,13 @@
 , pytest-golden
 , pytestCheckHook
 , pythonOlder
+, pythonRelaxDepsHook
 , pyyaml
 }:
 
 buildPythonPackage rec {
   pname = "ical";
-  version = "4.5.3";
+  version = "4.5.4";
   format = "setuptools";
 
   disabled = pythonOlder "3.9";
@@ -27,9 +28,17 @@ buildPythonPackage rec {
     owner = "allenporter";
     repo = pname;
     rev = "refs/tags/${version}";
-    hash = "sha256-CHo6khJ8Bqej/OdQBtcfa/luO1Gj8cu7h//MwPhWrMU=";
+    hash = "sha256-UcuJ23yzpRHDUFlwov692UyLXP/9Qb4F+IJIszo12/M=";
   };
 
+  nativeBuildInputs = [
+    pythonRelaxDepsHook
+  ];
+
+  pythonRelaxDeps = [
+    "tzdata"
+  ];
+
   propagatedBuildInputs = [
     emoji
     python-dateutil