diff --git a/pkgs/desktops/gnome/core/evolution-data-server/default.nix b/pkgs/desktops/gnome/core/evolution-data-server/default.nix
index e66479913958..f372f688eabc 100644
--- a/pkgs/desktops/gnome/core/evolution-data-server/default.nix
+++ b/pkgs/desktops/gnome/core/evolution-data-server/default.nix
@@ -1,6 +1,6 @@
 { stdenv
 , lib
-, fetchzip
+, fetchurl
 , substituteAll
 , pkg-config
 , gnome
@@ -55,16 +55,9 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "dev" ];
 
-  src = fetchzip {
+  src = fetchurl {
     url = "mirror://gnome/sources/evolution-data-server/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "7TXEArGpnOxfQGnMtacYwHjCyH15RAjJW09lvVo1uDI=";
-
-    postFetch = ''
-      # Very dirty hack to make update script happy.
-      substituteInPlace $out/src/calendar/libecal/e-reminder-watcher.c \
-        --replace "settings = g_settings_new (schema_id)" "settings = NULL" \
-        --replace 'e_reminder_watcher_load_settings_tentative ("' 'g_settings_new ("'
-    '';
+    sha256 = "kfT/w4objS/ok5g0RJrFQcC/9KObRE7cKpUpNEoo6Yo=";
   };
 
   patches = [
@@ -72,6 +65,10 @@ stdenv.mkDerivation rec {
       src = ./fix-paths.patch;
       inherit tzdata;
     })
+
+    # Avoid using wrapper function, which the hardcode gsettings
+    # patch generator cannot handle.
+    ./drop-tentative-settings-constructor.patch
   ];
 
   prePatch = ''
@@ -169,7 +166,7 @@ stdenv.mkDerivation rec {
         "org.gnome.evolution-data-server" = "EDS";
         "org.gnome.desktop.interface" = "GDS";
       };
-      inherit src;
+      inherit src patches;
     };
     updateScript =
       let
diff --git a/pkgs/desktops/gnome/core/evolution-data-server/drop-tentative-settings-constructor.patch b/pkgs/desktops/gnome/core/evolution-data-server/drop-tentative-settings-constructor.patch
new file mode 100644
index 000000000000..a86d1966eb6b
--- /dev/null
+++ b/pkgs/desktops/gnome/core/evolution-data-server/drop-tentative-settings-constructor.patch
@@ -0,0 +1,40 @@
+diff --git a/src/calendar/libecal/e-reminder-watcher.c b/src/calendar/libecal/e-reminder-watcher.c
+index f1614f2..c01e8b2 100644
+--- a/src/calendar/libecal/e-reminder-watcher.c
++++ b/src/calendar/libecal/e-reminder-watcher.c
+@@ -2609,26 +2609,6 @@ e_reminder_watcher_load_clock_format (EReminderWatcher *watcher)
+ 	g_free (clock_format);
+ }
+ 
+-static GSettings*
+-e_reminder_watcher_load_settings_tentative (const gchar *schema_id)
+-{
+-	GSettings *settings;
+-	GSettingsSchemaSource *schema_source;
+-	GSettingsSchema *schema;
+-
+-	schema_source = g_settings_schema_source_get_default ();
+-	schema = g_settings_schema_source_lookup (schema_source, schema_id, TRUE);
+-
+-	if (schema == NULL) {
+-		return NULL;
+-	}
+-
+-	settings = g_settings_new (schema_id);
+-	/* only unref after g_settings_new() to avoid needless realloc */
+-	g_settings_schema_unref (schema);
+-	return settings;
+-}
+-
+ static void
+ e_reminder_watcher_init (EReminderWatcher *watcher)
+ {
+@@ -2647,7 +2627,7 @@ e_reminder_watcher_init (EReminderWatcher *watcher)
+ 	watcher->priv = e_reminder_watcher_get_instance_private (watcher);
+ 	watcher->priv->cancellable = g_cancellable_new ();
+ 	watcher->priv->settings = g_settings_new ("org.gnome.evolution-data-server.calendar");
+-	watcher->priv->desktop_settings = e_reminder_watcher_load_settings_tentative ("org.gnome.desktop.interface");
++	watcher->priv->desktop_settings = g_settings_new ("org.gnome.desktop.interface");
+ 	if (watcher->priv->desktop_settings) {
+ 		g_signal_connect_object (
+ 			watcher->priv->desktop_settings,
diff --git a/pkgs/desktops/gnome/core/evolution-data-server/hardcode-gsettings.patch b/pkgs/desktops/gnome/core/evolution-data-server/hardcode-gsettings.patch
index 1c875a84e5bb..4857efc4c230 100644
--- a/pkgs/desktops/gnome/core/evolution-data-server/hardcode-gsettings.patch
+++ b/pkgs/desktops/gnome/core/evolution-data-server/hardcode-gsettings.patch
@@ -202,10 +202,10 @@ index 2525856..7ecc1a8 100644
  				g_clear_object (&settings);
  			}
 diff --git a/src/calendar/libecal/e-reminder-watcher.c b/src/calendar/libecal/e-reminder-watcher.c
-index 2dbdd99..a6cf45c 100644
+index c01e8b2..59fb4c4 100644
 --- a/src/calendar/libecal/e-reminder-watcher.c
 +++ b/src/calendar/libecal/e-reminder-watcher.c
-@@ -2646,8 +2646,33 @@ e_reminder_watcher_init (EReminderWatcher *watcher)
+@@ -2626,8 +2626,33 @@ e_reminder_watcher_init (EReminderWatcher *watcher)
  
  	watcher->priv = e_reminder_watcher_get_instance_private (watcher);
  	watcher->priv->cancellable = g_cancellable_new ();