diff --git a/users/Profpatsch/shell.nix b/users/Profpatsch/shell.nix
index b5095d476..ec3326fe8 100644
--- a/users/Profpatsch/shell.nix
+++ b/users/Profpatsch/shell.nix
@@ -45,7 +45,7 @@ pkgs.mkShell {
       h.unix
       h.tagsoup
       h.attoparsec
-      h.iCalendar
+      # h.iCalendar
       h.case-insensitive
       h.hscolour
       h.nicify-lib