diff --git a/src/SPC/builder/unix/UnixBuilderBase.php b/src/SPC/builder/unix/UnixBuilderBase.php
index 0e3b6ab6..79afdf16 100644
--- a/src/SPC/builder/unix/UnixBuilderBase.php
+++ b/src/SPC/builder/unix/UnixBuilderBase.php
@@ -205,17 +205,19 @@ abstract class UnixBuilderBase extends BuilderBase
             if (PHP_OS_FAMILY === 'Linux' && getenv('SPC_LIBC') === 'musl') {
                 $lens .= ' -static';
             }
-            [$ret, $out] = shell()->cd($sample_file_path)->execWithResult(getenv('CC') . ' -o embed embed.c ' . $lens);
-            if ($ret !== 0) {
-                throw new RuntimeException('embed failed sanity check: build failed. Error message: ' . implode("\n", $out));
-            }
             // if someone changed to EMBED_TYPE=shared, we need to add LD_LIBRARY_PATH
             if (getenv('SPC_CMD_VAR_PHP_EMBED_TYPE') === 'shared') {
                 $ext_path = 'LD_LIBRARY_PATH=' . BUILD_ROOT_PATH . '/lib:$LD_LIBRARY_PATH ';
                 FileSystem::removeFileIfExists(BUILD_ROOT_PATH . '/lib/libphp.a');
             } else {
                 $ext_path = '';
-                FileSystem::removeFileIfExists(BUILD_ROOT_PATH . '/lib/libphp.so');
+                foreach (glob(BUILD_LIB_PATH . '/libphp*.so') as $file) {
+                    unlink($file);
+                }
+            }
+            [$ret, $out] = shell()->cd($sample_file_path)->execWithResult(getenv('CC') . ' -o embed embed.c ' . $lens);
+            if ($ret !== 0) {
+                throw new RuntimeException('embed failed sanity check: build failed. Error message: ' . implode("\n", $out));
             }
             [$ret, $output] = shell()->cd($sample_file_path)->execWithResult($ext_path . './embed');
             if ($ret !== 0 || trim(implode('', $output)) !== 'hello') {