diff --git a/libnotify/meson.build b/libnotify/meson.build
index c1fb485..2258a1d 100644
--- a/libnotify/meson.build
+++ b/libnotify/meson.build
@@ -69,8 +69,9 @@ pkgconfig.generate(libnotify_lib,
 )
 
 introspection = get_option('introspection')
-if not introspection.disabled()
-  find_program('g-ir-scanner', required: introspection.enabled())
+g_ir_scanner = find_program('g-ir-scanner', required: introspection.enabled())
+
+if g_ir_scanner.found() and not introspection.disabled()
   gnome.generate_gir(libnotify_lib,
     sources: headers + sources + enum_types,
     namespace: 'Notify',
diff --git a/libnotify/notification.c b/libnotify/notification.c
index 1c442db..55cc46f 100644
--- a/libnotify/notification.c
+++ b/libnotify/notification.c
@@ -1056,7 +1056,11 @@ notify_notification_set_hint_byte_array (NotifyNotification *notification,
 
         g_return_if_fail (value != NULL || len == 0);
 
+#ifdef GLIB_VERSION_2_68
+        value_dup = g_memdup2 (value, len);
+#else
         value_dup = g_memdup (value, len);
+#endif
         notify_notification_set_hint (notification, key,
                                       g_variant_new_from_data (G_VARIANT_TYPE ("ay"),
                                                                value_dup,
diff --git a/meson.build b/meson.build
index 088b7ed..a803f0d 100644
--- a/meson.build
+++ b/meson.build
@@ -66,7 +66,7 @@ if get_option('man')
     '@INPUT@',
   ]
 
-  testrun = run_command(xsltproc, '--nonet', stylesheet)
+  testrun = run_command(xsltproc, '--nonet', stylesheet, check: false)
 
   if testrun.returncode() != 0
     error('DocBook stylesheet for generating man pages not found, you need to install docbook-xsl-ns or similar package.')