diff --git a/pkgs/by-name/ca/calendar-cli/package.nix b/pkgs/by-name/ca/calendar-cli/package.nix
index 88af1e0efe2b..2bfc9144085b 100644
--- a/pkgs/by-name/ca/calendar-cli/package.nix
+++ b/pkgs/by-name/ca/calendar-cli/package.nix
@@ -40,6 +40,7 @@ python3.pkgs.buildPythonApplication rec {
     tzlocal
     click
     six
+    vobject
   ];
 
   nativeCheckInputs = [