diff --git a/src/process/exec.ts b/src/process/exec.ts
index 44f8b2ce0..d8b4f48de 100644
--- a/src/process/exec.ts
+++ b/src/process/exec.ts
@@ -80,11 +80,13 @@ export async function runCommandWithTimeout(
   }
 
   const stdio = resolveCommandStdio({ hasInput, preferInherit: true });
+  const isWindows = process.platform === "win32";
   const child = spawn(argv[0], argv.slice(1), {
     stdio,
     cwd,
     env: resolvedEnv,
     windowsVerbatimArguments,
+    shell: isWindows,
   });
   // Spawn with inherited stdin (TTY) so tools like `pi` stay interactive when needed.
   return await new Promise((resolve, reject) => {