diff --git a/helpers/repro-run.ts b/helpers/repro-run.ts
index 9f60f38..84c5e19 100644
--- a/helpers/repro-run.ts
+++ b/helpers/repro-run.ts
@@ -1,6 +1,5 @@
 import { chmod, mkdir, readFile, writeFile } from "node:fs/promises";
 import { join } from "node:path";
-import { Writable } from "node:stream";
 import { execFile } from "./better-api.js";
 
 export async function reproRun(opts: {
@@ -8,7 +7,7 @@ export async function reproRun(opts: {
   // cache/ and rootfs/
   cwd: string;
   command: string;
-  cache: string[];
+  cache?: string[];
 }): Promise<void> {
   const run = execFile("repro-run", { cwd: opts.cwd });
   if (!run.child.stdin) throw false;