diff --git a/src/SPC/builder/extension/lz4.php b/src/SPC/builder/extension/lz4.php
index 541b1ecd..5727a97d 100644
--- a/src/SPC/builder/extension/lz4.php
+++ b/src/SPC/builder/extension/lz4.php
@@ -15,7 +15,7 @@ class lz4 extends Extension
         return '--enable-lz4' . ($shared ? '=shared' : '') . ' --with-lz4-includedir=' . BUILD_ROOT_PATH;
     }
 
-    public function getWindowsConfigureArg(): string
+    public function getWindowsConfigureArg(bool $shared = false): string
     {
         return '--enable-lz4';
     }
diff --git a/src/SPC/builder/linux/SystemUtil.php b/src/SPC/builder/linux/SystemUtil.php
index e873667a..a85f3dec 100644
--- a/src/SPC/builder/linux/SystemUtil.php
+++ b/src/SPC/builder/linux/SystemUtil.php
@@ -9,9 +9,10 @@ use SPC\exception\RuntimeException;
 
 class SystemUtil
 {
-    static ?string $libc_version = null;
     use UnixSystemUtilTrait;
 
+    public static ?string $libc_version = null;
+
     /** @noinspection PhpMissingBreakStatementInspection */
     public static function getOSRelease(): array
     {