diff --git a/src/debug.js b/src/debug.js
index 89b08b4..c5a83fd 100644
--- a/src/debug.js
+++ b/src/debug.js
@@ -11,6 +11,6 @@ const Me = extensionUtils.getCurrentExtension();
  * @param  {string} msg Message to print.
  */
 function message(msg) {
-    if ('@BUILD_TYPE@' === 'debug') // eslint-disable-line no-constant-condition
+    if (Me.metadata['build-type'] === 'debug')
         console.log(`[${Me.metadata.name}] ${msg}`);
 }
diff --git a/src/meson.build b/src/meson.build
index 5a0dae4..22a60f5 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -7,21 +7,14 @@ configure_file(
   configuration: {
     'DNS': DNS,
     'UUID': UUID,
-    'VERSION': meson.project_version()
-  },
-  install_dir: INSTALL_DIR
-)
-
-configure_file(
-  input: 'debug.js',
-  output: 'debug.js',
-  configuration: {
+    'VERSION': meson.project_version(),
     'BUILD_TYPE': get_option('buildtype')
   },
   install_dir: INSTALL_DIR
 )
 
 main = [
+  'debug.js',
   'extension.js',
   'prefs.js',
   'utils.js',
diff --git a/src/metadata.json.in b/src/metadata.json.in
index 253a3d5..4780294 100644
--- a/src/metadata.json.in
+++ b/src/metadata.json.in
@@ -7,5 +7,6 @@
 	"url": "https://nightthemeswitcher.romainvigier.fr",
 	"session-modes": ["unlock-dialog", "user"],
 	"shell-version": ["43"],
-	"version": @VERSION@
+	"version": @VERSION@,
+	"build-type": "@BUILD_TYPE@"
 }