diff --git a/src/SPC/builder/linux/LinuxBuilder.php b/src/SPC/builder/linux/LinuxBuilder.php
index a7758587..b0f1efe7 100644
--- a/src/SPC/builder/linux/LinuxBuilder.php
+++ b/src/SPC/builder/linux/LinuxBuilder.php
@@ -97,10 +97,10 @@ class LinuxBuilder extends UnixBuilderBase
         $enableFrankenphp = ($build_target & BUILD_TARGET_FRANKENPHP) === BUILD_TARGET_FRANKENPHP;
 
         // prepare build php envs
-        $musl_flag = SPCTarget::getLibc() === 'musl' ? ' -D__MUSL__' : ' -U__MUSL__';
+        // $musl_flag = SPCTarget::getLibc() === 'musl' ? ' -D__MUSL__' : ' -U__MUSL__';
         $php_configure_env = SystemUtil::makeEnvVarString([
             'CFLAGS' => getenv('SPC_CMD_VAR_PHP_CONFIGURE_CFLAGS'),
-            'CPPFLAGS' => '-I' . BUILD_INCLUDE_PATH . $musl_flag,
+            'CPPFLAGS' => '-I' . BUILD_INCLUDE_PATH, // . $musl_flag,
             'LDFLAGS' => '-L' . BUILD_LIB_PATH,
             // 'LIBS' => SPCTarget::getRuntimeLibs(), // do not pass static libraries here yet, they may contain polyfills for libc functions!
         ]);
@@ -359,7 +359,7 @@ class LinuxBuilder extends UnixBuilderBase
         $static = SPCTarget::isStatic() ? '-all-static' : '';
         $lib = BUILD_LIB_PATH;
         return [
-            'CPPFLAGS' => SPCTarget::getLibc() === 'musl' ? '-D__MUSL__' : '-U__MUSL__',
+            // 'CPPFLAGS' => SPCTarget::getLibc() === 'musl' ? '-D__MUSL__' : '-U__MUSL__',
             'EXTRA_CFLAGS' => getenv('SPC_CMD_VAR_PHP_MAKE_EXTRA_CFLAGS'),
             'EXTRA_LIBS' => $config['libs'],
             'EXTRA_LDFLAGS' => getenv('SPC_CMD_VAR_PHP_MAKE_EXTRA_LDFLAGS'),
diff --git a/src/SPC/store/SourcePatcher.php b/src/SPC/store/SourcePatcher.php
index b8f133c4..1eed5595 100644
--- a/src/SPC/store/SourcePatcher.php
+++ b/src/SPC/store/SourcePatcher.php
@@ -86,6 +86,16 @@ class SourcePatcher
             );
         }
 
+        // patch configure.ac
+        FileSystem::replaceFileStr(
+            SOURCE_PATH . '/php-src/configure.ac',
+            'if command -v ldd >/dev/null && ldd --version 2>&1 | grep ^musl >/dev/null 2>&1',
+            'if [ "$SPC_LIBC" = "musl" ];'
+        );
+        if (getenv('SPC_LIBC') === false && ($libc = SPCTarget::getLibc()) !== null) {
+            putenv("SPC_LIBC={$libc}");
+        }
+
         // patch php-src/build/php.m4 PKG_CHECK_MODULES -> PKG_CHECK_MODULES_STATIC
         FileSystem::replaceFileStr(SOURCE_PATH . '/php-src/build/php.m4', 'PKG_CHECK_MODULES(', 'PKG_CHECK_MODULES_STATIC(');
 
diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index 2f9a6c75..d311962d 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -18,7 +18,7 @@ $test_php_version = [
     // '8.3',
     '8.4',
     // '8.5',
-    // 'git',
+    'git',
 ];
 
 // test os (macos-13, macos-14, macos-15, ubuntu-latest, windows-latest are available)
@@ -28,7 +28,7 @@ $test_os = [
     // 'macos-15', // bin/spc for arm64
     'ubuntu-latest', // bin/spc-alpine-docker for x86_64
     // 'ubuntu-22.04', // bin/spc-gnu-docker for x86_64
-    // 'ubuntu-24.04', // bin/spc for x86_64
+    'ubuntu-24.04', // bin/spc for x86_64
     'ubuntu-22.04-arm', // bin/spc-gnu-docker for arm64
     'ubuntu-24.04-arm', // bin/spc for arm64
     // 'windows-latest', // .\bin\spc.ps1