diff --git a/pkgs/by-name/ev/evolution-ews/hardcode-gsettings.patch b/pkgs/by-name/ev/evolution-ews/hardcode-gsettings.patch
index 2e1611cc942b..2032686395fb 100644
--- a/pkgs/by-name/ev/evolution-ews/hardcode-gsettings.patch
+++ b/pkgs/by-name/ev/evolution-ews/hardcode-gsettings.patch
@@ -1,8 +1,17 @@
 diff --git a/src/EWS/camel/camel-ews-utils.c b/src/EWS/camel/camel-ews-utils.c
-index 44a20d6..90d5729 100644
+index 32817df..da65217 100644
 --- a/src/EWS/camel/camel-ews-utils.c
 +++ b/src/EWS/camel/camel-ews-utils.c
-@@ -1554,7 +1554,18 @@ ews_utils_save_category_changes (GHashTable *old_categories, /* gchar *guid ~> C
+@@ -1550,7 +1550,7 @@ ews_utils_save_category_changes (GHashTable *old_categories, /* gchar *guid ~> C
+ 	gboolean changed = FALSE;
+ 
+ 	/* cannot save, when evolution is not installed */
+-	if (!e_ews_common_utils_gsettings_schema_exists ("org.gnome.evolution.mail"))
++	if (!true)
+ 		return FALSE;
+ 
+ 	if (!old_categories || !new_categories)
+@@ -1558,7 +1558,18 @@ ews_utils_save_category_changes (GHashTable *old_categories, /* gchar *guid ~> C
  
  	evo_labels = g_ptr_array_new_full (5, g_free);
  
@@ -23,10 +32,19 @@ index 44a20d6..90d5729 100644
  
  	for (ii = 0; strv && strv[ii]; ii++) {
 diff --git a/src/Microsoft365/camel/camel-m365-store.c b/src/Microsoft365/camel/camel-m365-store.c
-index 3db3564..a233d4d 100644
+index 7374c36..7da2023 100644
 --- a/src/Microsoft365/camel/camel-m365-store.c
 +++ b/src/Microsoft365/camel/camel-m365-store.c
-@@ -309,7 +309,18 @@ m365_store_save_category_changes (GHashTable *old_categories, /* gchar *id ~> Ca
+@@ -305,7 +305,7 @@ m365_store_save_category_changes (GHashTable *old_categories, /* gchar *id ~> Ca
+ 	gboolean changed = FALSE;
+ 
+ 	/* cannot save, when evolution is not installed */
+-	if (!e_ews_common_utils_gsettings_schema_exists ("org.gnome.evolution.mail"))
++	if (!true)
+ 		return FALSE;
+ 
+ 	if (!old_categories || !new_categories)
+@@ -313,7 +313,18 @@ m365_store_save_category_changes (GHashTable *old_categories, /* gchar *id ~> Ca
  
  	evo_labels = g_ptr_array_new_full (5, g_free);
  
@@ -47,51 +65,58 @@ index 3db3564..a233d4d 100644
  
  	for (ii = 0; strv && strv[ii]; ii++) {
 diff --git a/src/Microsoft365/common/e-m365-tz-utils.c b/src/Microsoft365/common/e-m365-tz-utils.c
-index 7a1d7f4..3c0d5e1 100644
+index cec5417..2e744a0 100644
 --- a/src/Microsoft365/common/e-m365-tz-utils.c
 +++ b/src/Microsoft365/common/e-m365-tz-utils.c
-@@ -192,7 +192,18 @@ e_m365_tz_utils_get_user_timezone (void)
- 	gchar *location;
+@@ -192,10 +192,21 @@ e_m365_tz_utils_get_user_timezone (void)
+ 	gchar *location = NULL;
  	ICalTimezone *zone = NULL;
  
--	settings = g_settings_new ("org.gnome.evolution.calendar");
-+	{
-+		g_autoptr(GSettingsSchemaSource) schema_source;
-+		g_autoptr(GSettingsSchema) schema;
-+		schema_source = g_settings_schema_source_new_from_directory("@evo@",
-+									    g_settings_schema_source_get_default(),
-+									    TRUE,
-+									    NULL);
-+		schema = g_settings_schema_source_lookup(schema_source,
-+							 "org.gnome.evolution.calendar",
-+							 FALSE);
-+		settings = g_settings_new_full(schema, NULL, NULL);
-+	}
+-	if (e_ews_common_utils_gsettings_schema_exists ("org.gnome.evolution.calendar")) {
++	if (true) {
+ 		GSettings *settings;
  
- 	if (g_settings_get_boolean (settings, "use-system-timezone"))
- 		location = e_cal_util_get_system_timezone_location ();
+-		settings = g_settings_new ("org.gnome.evolution.calendar");
++		{
++			g_autoptr(GSettingsSchemaSource) schema_source;
++			g_autoptr(GSettingsSchema) schema;
++			schema_source = g_settings_schema_source_new_from_directory("@evo@",
++										    g_settings_schema_source_get_default(),
++										    TRUE,
++										    NULL);
++			schema = g_settings_schema_source_lookup(schema_source,
++								 "org.gnome.evolution.calendar",
++								 FALSE);
++			settings = g_settings_new_full(schema, NULL, NULL);
++		}
+ 
+ 		if (g_settings_get_boolean (settings, "use-system-timezone"))
+ 			location = e_cal_util_get_system_timezone_location ();
 diff --git a/src/common/e-ews-common-utils.c b/src/common/e-ews-common-utils.c
-index 5017d40..34547e3 100644
+index 3458c10..7d21784 100644
 --- a/src/common/e-ews-common-utils.c
 +++ b/src/common/e-ews-common-utils.c
-@@ -218,7 +218,19 @@ e_ews_common_utils_get_configured_icaltimezone (void)
- 		if (schema) {
- 			GSettings *settings;
+@@ -208,10 +208,21 @@ e_ews_common_utils_get_configured_icaltimezone (void)
+ 	ICalTimezone *zone = NULL;
+ 	gchar *location = NULL;
  
--			settings = g_settings_new ("org.gnome.evolution.calendar");
-+			{
-+				g_autoptr(GSettingsSchemaSource) schema_source;
-+				g_autoptr(GSettingsSchema) schema;
-+				schema_source = g_settings_schema_source_new_from_directory("@evo@",
-+											    g_settings_schema_source_get_default(),
-+											    TRUE,
-+											    NULL);
-+				schema = g_settings_schema_source_lookup(schema_source,
-+									 "org.gnome.evolution.calendar",
-+									 FALSE);
-+				settings = g_settings_new_full(schema, NULL,
-+							       NULL);
-+			}
+-	if (e_ews_common_utils_gsettings_schema_exists ("org.gnome.evolution.calendar")) {
++	if (true) {
+ 		GSettings *settings;
  
- 			if (g_settings_get_boolean (settings, "use-system-timezone"))
- 				location = e_cal_util_get_system_timezone_location ();
+-		settings = g_settings_new ("org.gnome.evolution.calendar");
++		{
++			g_autoptr(GSettingsSchemaSource) schema_source;
++			g_autoptr(GSettingsSchema) schema;
++			schema_source = g_settings_schema_source_new_from_directory("@evo@",
++										    g_settings_schema_source_get_default(),
++										    TRUE,
++										    NULL);
++			schema = g_settings_schema_source_lookup(schema_source,
++								 "org.gnome.evolution.calendar",
++								 FALSE);
++			settings = g_settings_new_full(schema, NULL, NULL);
++		}
+ 
+ 		if (g_settings_get_boolean (settings, "use-system-timezone"))
+ 			location = e_cal_util_get_system_timezone_location ();
diff --git a/pkgs/by-name/ev/evolution-ews/package.nix b/pkgs/by-name/ev/evolution-ews/package.nix
index 4298118ad7c0..9b4a5d7d3e3c 100644
--- a/pkgs/by-name/ev/evolution-ews/package.nix
+++ b/pkgs/by-name/ev/evolution-ews/package.nix
@@ -23,11 +23,11 @@
 
 stdenv.mkDerivation rec {
   pname = "evolution-ews";
-  version = "3.54.3.0";
+  version = "3.56.1";
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    hash = "sha256-GscHzyWRqERRJXViGkkwx2GyF028XsscihhSYpRqFPY=";
+    hash = "sha256-DgC2qxV9j+r7T1HXchusP2IfI4f1WrS7PEPRN0KFrWs=";
   };
 
   patches = [
@@ -71,6 +71,7 @@ stdenv.mkDerivation rec {
         "org.gnome.evolution.mail" = "evo";
         "org.gnome.evolution.calendar" = "evo";
       };
+      schemaExistsFunction = "e_ews_common_utils_gsettings_schema_exists";
     };
 
     updateScript =