diff --git a/src/installer-rp/pack.ts b/src/installer-rp/pack.ts
index 47aa8b4..01ea052 100644
--- a/src/installer-rp/pack.ts
+++ b/src/installer-rp/pack.ts
@@ -99,9 +99,9 @@ function zipDirectory(srcDir: string, outZipPath: string): Promise<void> {
     const archive = archiver('zip', { zlib: { level: 9 } })
     output.on('close', () => resolve())
     output.on('error', reject)
-    archive.on('warning', (err) => {
+    archive.on('warning', (err: Error & { code?: string }) => {
       // ENOENT 정도면 무시, 그 외는 reject.
-      if ((err as NodeJS.ErrnoException).code === 'ENOENT') return
+      if (err.code === 'ENOENT') return
       reject(err)
     })
     archive.on('error', reject)