diff --git a/pkgs/development/python-modules/ical/default.nix b/pkgs/development/python-modules/ical/default.nix
index d7cf8e79fad5..d95a34fbbc84 100644
--- a/pkgs/development/python-modules/ical/default.nix
+++ b/pkgs/development/python-modules/ical/default.nix
@@ -11,30 +11,35 @@
 , pytest-golden
 , pytestCheckHook
 , pythonOlder
+, pythonRelaxDepsHook
 , python-dateutil
 , pyyaml
 , setuptools
-, syrupy
 }:
 
 buildPythonPackage rec {
   pname = "ical";
-  version = "7.0.0";
+  version = "6.1.1";
   pyproject = true;
 
   disabled = pythonOlder "3.10";
 
   src = fetchFromGitHub {
     owner = "allenporter";
-    repo = "ical";
+    repo = pname;
     rev = "refs/tags/${version}";
-    hash = "sha256-S/6zyUFXSWcnnLNSwz1smovSyodhKeRVbT9lj7+KLWo=";
+    hash = "sha256-pFmJYXIhc9jhpc9ZjSNaol5h5Jb8ZvxuQsQL/2Rjryc=";
   };
 
   nativeBuildInputs = [
+    pythonRelaxDepsHook
     setuptools
   ];
 
+  pythonRelaxDeps = [
+    "tzdata"
+  ];
+
   propagatedBuildInputs = [
     python-dateutil
     tzdata
@@ -50,7 +55,6 @@ buildPythonPackage rec {
     pytest-golden
     pytestCheckHook
     pyyaml
-    syrupy
   ];
 
   pythonImportsCheck = [