diff --git a/src/SPC/util/GlobalEnvManager.php b/src/SPC/util/GlobalEnvManager.php
index ae251223..17785205 100644
--- a/src/SPC/util/GlobalEnvManager.php
+++ b/src/SPC/util/GlobalEnvManager.php
@@ -45,7 +45,7 @@ class GlobalEnvManager
         // Define env vars for linux
         if (PHP_OS_FAMILY === 'Linux') {
             $arch = getenv('GNU_ARCH');
-            if (SystemUtil::isMuslDist() || getenv('SPC_LIBC') !== 'musl') {
+            if (SystemUtil::isMuslDist() || getenv('SPC_LIBC') === 'glibc') {
                 self::putenv('SPC_LINUX_DEFAULT_CC=gcc');
                 self::putenv('SPC_LINUX_DEFAULT_CXX=g++');
                 self::putenv('SPC_LINUX_DEFAULT_AR=ar');
diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index 79acc984..db51db5e 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -24,7 +24,7 @@ $test_os = [
     'macos-13',
     // 'macos-14',
     'macos-15',
-    // 'ubuntu-latest',
+    'ubuntu-latest',
     'ubuntu-22.04',
     'ubuntu-24.04',
     'ubuntu-22.04-arm',