diff --git a/pkgs/desktops/gnome-3/apps/gnome-calendar/default.nix b/pkgs/desktops/gnome-3/apps/gnome-calendar/default.nix
index 347cd7a16ae..05275fa01ac 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-calendar/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-calendar/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, meson, ninja, pkgconfig, wrapGAppsHook, libdazzle, libgweather, geoclue2, geocode-glib
+{ stdenv, fetchurl, meson, ninja, pkgconfig, wrapGAppsHook, libdazzle, libgweather, geoclue2, geocode-glib, python3
 , gettext, libxml2, gnome3, gtk, evolution-data-server, libsoup
 , glib, gnome-online-accounts, gsettings-desktop-schemas }:
 
@@ -20,7 +20,7 @@ in stdenv.mkDerivation rec {
     };
   };
 
-  nativeBuildInputs = [ meson ninja pkgconfig gettext libxml2 wrapGAppsHook ];
+  nativeBuildInputs = [ meson ninja pkgconfig gettext libxml2 wrapGAppsHook python3 ];
   buildInputs = [
     gtk evolution-data-server libsoup glib gnome-online-accounts libdazzle libgweather geoclue2 geocode-glib
     gsettings-desktop-schemas gnome3.defaultIconTheme