diff --git a/src/SPC/builder/linux/LinuxBuilder.php b/src/SPC/builder/linux/LinuxBuilder.php
index 324bce32..0e0ac409 100644
--- a/src/SPC/builder/linux/LinuxBuilder.php
+++ b/src/SPC/builder/linux/LinuxBuilder.php
@@ -242,7 +242,7 @@ class LinuxBuilder extends UnixBuilderBase
         $SPC_CMD_PREFIX_PHP_MAKE = getenv('SPC_CMD_PREFIX_PHP_MAKE') ?: 'make';
         shell()->cd(SOURCE_PATH . '/php-src')
             ->exec('sed -i "s|//lib|/lib|g" Makefile')
-            ->exec("$SPC_CMD_PREFIX_PHP_MAKE {$vars} cli");
+            ->exec("{$SPC_CMD_PREFIX_PHP_MAKE} {$vars} cli");
 
         if ($this->getOption('with-upx-pack')) {
             shell()->cd(SOURCE_PATH . '/php-src/sapi/cli')
@@ -282,7 +282,7 @@ class LinuxBuilder extends UnixBuilderBase
 
         shell()->cd(SOURCE_PATH . '/php-src')
             ->exec('sed -i "s|//lib|/lib|g" Makefile')
-            ->exec("$SPC_CMD_PREFIX_PHP_MAKE {$vars} micro");
+            ->exec("{$SPC_CMD_PREFIX_PHP_MAKE} {$vars} micro");
 
         $this->processMicroUPX();
 
@@ -305,7 +305,7 @@ class LinuxBuilder extends UnixBuilderBase
         $SPC_CMD_PREFIX_PHP_MAKE = getenv('SPC_CMD_PREFIX_PHP_MAKE') ?: 'make';
         shell()->cd(SOURCE_PATH . '/php-src')
             ->exec('sed -i "s|//lib|/lib|g" Makefile')
-            ->exec("$SPC_CMD_PREFIX_PHP_MAKE {$vars} fpm");
+            ->exec("{$SPC_CMD_PREFIX_PHP_MAKE} {$vars} fpm");
 
         if ($this->getOption('with-upx-pack')) {
             shell()->cd(SOURCE_PATH . '/php-src/sapi/fpm')
diff --git a/src/SPC/builder/macos/MacOSBuilder.php b/src/SPC/builder/macos/MacOSBuilder.php
index 85533045..cb2bac74 100644
--- a/src/SPC/builder/macos/MacOSBuilder.php
+++ b/src/SPC/builder/macos/MacOSBuilder.php
@@ -227,7 +227,7 @@ class MacOSBuilder extends UnixBuilderBase
 
         $shell = shell()->cd(SOURCE_PATH . '/php-src');
         $SPC_CMD_PREFIX_PHP_MAKE = getenv('SPC_CMD_PREFIX_PHP_MAKE') ?: 'make';
-        $shell->exec("$SPC_CMD_PREFIX_PHP_MAKE {$vars} cli");
+        $shell->exec("{$SPC_CMD_PREFIX_PHP_MAKE} {$vars} cli");
         if (!$this->getOption('no-strip', false)) {
             $shell->exec('dsymutil -f sapi/cli/php')->exec('strip sapi/cli/php');
         }