Properly resolve base config (#545)

lib/options-manager.js

@@ -52,6 +52,9 @@ resolveFrom.silent = (moduleId, fromDirectory) => {
 	} catch { }
 };
 
+// TODO: Use `resolveModule(normalizePackageName(name), import.meta.url);` when moving to ESM then to `import.meta.resolve(normalizePackageName(name))` when supported
+const resolveLocalConfig = name => resolveModule(normalizePackageName(name, 'eslint-config'), require.main.filename);
+
 const nodeVersion = process && process.version;
 const cacheLocation = findCacheDir({name: CACHE_DIR_NAME}) || path.join(os.homedir() || os.tmpdir(), '.xo-cache/');
 
@@ -62,7 +65,7 @@ const DEFAULT_CONFIG = {
 	globInputPaths: false,
 	baseConfig: {
 		extends: [
-			resolveFrom('eslint-config-xo'),
+			resolveLocalConfig('xo'),
 			path.join(__dirname, '../config/overrides.js'),
 			path.join(__dirname, '../config/plugins.js')
 		]