diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 63cb8a25..ad6c308a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -55,6 +55,8 @@ jobs:
           extensions: curl, openssl, mbstring
           ini-values: memory_limit=-1
           tools: composer
+        env:
+          phpts: zts
 
       - name: "Cache Composer packages"
         id: composer-cache
diff --git a/src/SPC/builder/unix/UnixBuilderBase.php b/src/SPC/builder/unix/UnixBuilderBase.php
index dba5ca11..a82be71c 100644
--- a/src/SPC/builder/unix/UnixBuilderBase.php
+++ b/src/SPC/builder/unix/UnixBuilderBase.php
@@ -338,8 +338,6 @@ abstract class UnixBuilderBase extends BuilderBase
         }
 
         $config = (new SPCConfigUtil($this))->config($this->ext_list, $this->lib_list, with_dependencies: true);
-        $libphp = getenv('SPC_CMD_VAR_PHP_EMBED_TYPE') === 'shared' ? 'libphp.so' : 'libphp.a';
-        $config['libs'] = str_replace('-lphp', BUILD_LIB_PATH . '/' . $libphp, $config['libs']);
 
         $env = [
             'CGO_ENABLED' => '1',