diff --git a/src/SPC/builder/extension/amqp.php b/src/SPC/builder/extension/amqp.php
index 40a6131c..7e0ea2de 100644
--- a/src/SPC/builder/extension/amqp.php
+++ b/src/SPC/builder/extension/amqp.php
@@ -25,7 +25,7 @@ class amqp extends Extension
 
     public function getUnixConfigureArg(bool $shared = false): string
     {
-        return '--with-amqp --with-librabbitmq-dir=' . BUILD_ROOT_PATH;
+        return '--with-amqp' . ($shared ? '=shared' : '') . ' --with-librabbitmq-dir=' . BUILD_ROOT_PATH;
     }
 
     public function getWindowsConfigureArg($shared = false): string
diff --git a/src/SPC/builder/extension/spx.php b/src/SPC/builder/extension/spx.php
index 9e3ead3a..8436b96f 100644
--- a/src/SPC/builder/extension/spx.php
+++ b/src/SPC/builder/extension/spx.php
@@ -13,7 +13,7 @@ class spx extends Extension
     public function getUnixConfigureArg(bool $shared = false): string
     {
         $arg = '--enable-spx' . ($shared ? '=shared' : '');
-        if ($this->builder->getExt('zlib') === null) {
+        if ($this->builder->getLib('zlib') !== null) {
             $arg .= ' --with-zlib-dir=' . BUILD_ROOT_PATH;
         }
         return $arg;