diff --git a/packages/celest_core/ffigen.glib.yaml b/packages/celest_core/ffigen.glib.yaml
index 0af4a67b..c59218d5 100644
--- a/packages/celest_core/ffigen.glib.yaml
+++ b/packages/celest_core/ffigen.glib.yaml
@@ -24,6 +24,7 @@ typedefs:
     - gboolean
     - gint
     - gpointer
+    - gchar
 functions:
   include:
     - g_hash_table_new
@@ -43,3 +44,9 @@ structs:
     "_GHashTable": GHashTable
     "_GCancellable": GCancellable
     "_GObject": GObject
+type-map:
+  typedefs:
+    gchar:
+      lib: pkg_ffi
+      c-type: Utf8
+      dart-type: Char
diff --git a/packages/celest_core/lib/src/native/linux/glib.ffi.dart b/packages/celest_core/lib/src/native/linux/glib.ffi.dart
index b516a959..e062d26e 100644
--- a/packages/celest_core/lib/src/native/linux/glib.ffi.dart
+++ b/packages/celest_core/lib/src/native/linux/glib.ffi.dart
@@ -6,6 +6,7 @@
 //
 // Generated by `package:ffigen`.
 import 'dart:ffi' as ffi;
+import 'package:ffi/ffi.dart' as pkg_ffi;
 
 /// Bindings for glib on Linux.
 ///
@@ -108,7 +109,7 @@ class Glib {
   late final _g_hash_table_insert = _g_hash_table_insertPtr
       .asFunction<int Function(ffi.Pointer<GHashTable>, gpointer, gpointer)>();
 
-  ffi.Pointer<ffi.Char> g_application_get_application_id(
+  ffi.Pointer<pkg_ffi.Utf8> g_application_get_application_id(
     ffi.Pointer<_GApplication> application,
   ) {
     return _g_application_get_application_id(
@@ -118,11 +119,11 @@ class Glib {
 
   late final _g_application_get_application_idPtr = _lookup<
       ffi.NativeFunction<
-          ffi.Pointer<ffi.Char> Function(
+          ffi.Pointer<pkg_ffi.Utf8> Function(
               ffi.Pointer<_GApplication>)>>('g_application_get_application_id');
   late final _g_application_get_application_id =
       _g_application_get_application_idPtr.asFunction<
-          ffi.Pointer<ffi.Char> Function(ffi.Pointer<_GApplication>)>();
+          ffi.Pointer<pkg_ffi.Utf8> Function(ffi.Pointer<_GApplication>)>();
 
   ffi.Pointer<_GApplication> g_application_get_default() {
     return _g_application_get_default();
@@ -142,7 +143,7 @@ final class GError extends ffi.Struct {
   @gint()
   external int code;
 
-  external ffi.Pointer<ffi.Char> message;
+  external ffi.Pointer<pkg_ffi.Utf8> message;
 }
 
 typedef gint = ffi.Int;
diff --git a/packages/celest_core/lib/src/secure_storage/secure_storage.linux.dart b/packages/celest_core/lib/src/secure_storage/secure_storage.linux.dart
index c50cc425..e764bc91 100644
--- a/packages/celest_core/lib/src/secure_storage/secure_storage.linux.dart
+++ b/packages/celest_core/lib/src/secure_storage/secure_storage.linux.dart
@@ -32,15 +32,11 @@ final class SecureStoragePlatformLinux extends SecureStoragePlatform {
     if (application == nullptr) {
       return File('/proc/self/exe').resolveSymbolicLinksSync();
     }
-    return _gio
-        .g_application_get_application_id(application)
-        .cast<Utf8>()
-        .toDartString();
+    return _gio.g_application_get_application_id(application).toDartString();
   }();
 
-  String _labelFor(String key) => '$scope/$key';
-  Pointer<SecretSchema> _schemaFor(Arena arena) => arena<SecretSchema>()
-    ..ref.name = _appName.toNativeUtf8(allocator: arena)
+  Pointer<SecretSchema> _schema(Arena arena) => arena<SecretSchema>()
+    ..ref.name = '$_appName/$scope'.toNativeUtf8(allocator: arena)
     ..ref.flags = SecretSchemaFlags.SECRET_SCHEMA_NONE
     ..ref.attributes[0].name = 'key'.toNativeUtf8(allocator: arena)
     ..ref.attributes[0].type =
@@ -64,7 +60,7 @@ final class SecureStoragePlatformLinux extends SecureStoragePlatform {
 
   @override
   void clear() => using((arena) {
-        final schema = _schemaFor(arena);
+        final schema = _schema(arena);
         final attributes = _attributes(arena: arena);
         _check(
           (err) => _libSecret.secret_password_clearv_sync(
@@ -80,7 +76,7 @@ final class SecureStoragePlatformLinux extends SecureStoragePlatform {
   @override
   String? delete(String key) => using((arena) {
         final secret = read(key);
-        final schema = _schemaFor(arena);
+        final schema = _schema(arena);
         final attributes = _attributes(key: key, arena: arena);
         _check(
           (err) => _libSecret.secret_password_clearv_sync(
@@ -97,7 +93,7 @@ final class SecureStoragePlatformLinux extends SecureStoragePlatform {
   @override
   String? read(String key) => using((arena) {
         final attributes = _attributes(key: key, arena: arena);
-        final schema = _schemaFor(arena);
+        final schema = _schema(arena);
         final result = _check(
           (err) => _libSecret.secret_password_lookupv_sync(
             schema,
@@ -117,12 +113,13 @@ final class SecureStoragePlatformLinux extends SecureStoragePlatform {
   @override
   String write(String key, String value) {
     using((arena) {
-      final label = _labelFor(key).toNativeUtf8(allocator: arena);
+      final schema = _schema(arena);
+      final label = key.toNativeUtf8(allocator: arena);
       final secret = value.toNativeUtf8(allocator: arena);
       final attributes = _attributes(key: key, arena: arena);
       _check(
         (err) => _libSecret.secret_password_storev_sync(
-          _schemaFor(arena),
+          schema,
           attributes,
           nullptr,
           label,
@@ -145,7 +142,7 @@ final class SecureStoragePlatformLinux extends SecureStoragePlatform {
     final error = err.value;
     if (error != nullptr) {
       arena.onReleaseAll(() => _glib.g_error_free(error));
-      final message = error.ref.message.cast<Utf8>().toDartString();
+      final message = error.ref.message.toDartString();
       throw SecureStorageUnknownException(message);
     }
     return result;