diff --git a/packages/SwingSet/tools/bundleTool.js b/packages/SwingSet/tools/bundleTool.js
index d5d2cbd54949..43b9da59a0bd 100755
--- a/packages/SwingSet/tools/bundleTool.js
+++ b/packages/SwingSet/tools/bundleTool.js
@@ -1,8 +1,14 @@
 // eslint-disable-next-line import/no-extraneous-dependencies
 import { makeNodeBundleCache as wrappedMaker } from '@endo/bundle-source/cache.js';
+import { randomInt } from 'crypto';
 import styles from 'ansi-styles'; // less authority than 'chalk'
 
-export const makeNodeBundleCache = async (dest, options, loadModule) => {
+const getUniquishNumber = () => {
+  return randomInt(2 ** 32);
+};
+
+/** @type {typeof wrappedMaker} */
+export const makeNodeBundleCache = async (dest, options, loadModule, pid) => {
   const log = (...args) => {
     const flattened = args.map(arg =>
       // Don't print stack traces.
@@ -15,7 +21,7 @@ export const makeNodeBundleCache = async (dest, options, loadModule) => {
       styles.dim.close,
     );
   };
-  return wrappedMaker(dest, { log, ...options }, loadModule);
+  return wrappedMaker(dest, { log, ...options }, loadModule, pid);
 };
 
 /** @type {Map<string, ReturnType<typeof makeNodeBundleCache>>} */
@@ -33,7 +39,12 @@ export const provideBundleCache = (dest, options, loadModule) => {
   const uniqueDest = [dest, options.format, options.dev].join('-');
   let bundleCache = providedCaches.get(uniqueDest);
   if (!bundleCache) {
-    bundleCache = makeNodeBundleCache(dest, options, loadModule);
+    bundleCache = makeNodeBundleCache(
+      dest,
+      options,
+      loadModule,
+      getUniquishNumber(),
+    );
     providedCaches.set(uniqueDest, bundleCache);
   }
   return bundleCache;
@@ -41,4 +52,4 @@ export const provideBundleCache = (dest, options, loadModule) => {
 harden(provideBundleCache);
 
 export const unsafeMakeBundleCache = dest =>
-  makeNodeBundleCache(dest, {}, s => import(s));
+  makeNodeBundleCache(dest, {}, s => import(s), getUniquishNumber());
diff --git a/packages/deploy-script-support/exported.js b/packages/deploy-script-support/exported.js
index f4e93c01349e..25402b3902a8 100644
--- a/packages/deploy-script-support/exported.js
+++ b/packages/deploy-script-support/exported.js
@@ -1,3 +1 @@
-import '@endo/bundle-source/exported.js';
-
 import './src/externalTypes.js';
diff --git a/packages/deploy-script-support/src/install.js b/packages/deploy-script-support/src/install.js
index 5dd573514bdc..c73410db2a3b 100644
--- a/packages/deploy-script-support/src/install.js
+++ b/packages/deploy-script-support/src/install.js
@@ -5,18 +5,9 @@ import { E } from '@endo/far';
 
 /** @typedef {import('@agoric/deploy-script-support/src/externalTypes').Petname} Petname */
 
-/**
- * @callback BundleSource
- * @param {string} startFilename - the filepath to start the bundling from
- * @param {ModuleFormat | BundleOptions} [moduleFormat]
- * @param {object} [powers]
- * @param {ReadFn} [powers.read]
- * @param {CanonicalFn} [powers.canonical]
- */
-
 // XXX board is Board but specifying that leads to type errors with imports which aren't worth fixing right now
 /**
- * @param {BundleSource} bundleSource
+ * @param {typeof import('@endo/bundle-source')['default']} bundleSource
  * @param {ERef<ZoeService>} zoe
  * @param {ERef<import('./startInstance.js').InstallationManager>} installationManager
  * @param {ERef<any>} board
diff --git a/packages/smart-wallet/test/test-addAsset.js b/packages/smart-wallet/test/test-addAsset.js
index ef24b961c777..adb334397c74 100644
--- a/packages/smart-wallet/test/test-addAsset.js
+++ b/packages/smart-wallet/test/test-addAsset.js
@@ -362,9 +362,11 @@ test.serial('trading in non-vbank asset: game real-estate NFTs', async t => {
   const { consume, simpleProvideWallet, sendToBridge } = t.context;
 
   const bundles = {
-    game: await importSpec('./gameAssetContract.js').then(bundleSource),
+    game: await importSpec('./gameAssetContract.js').then(spec =>
+      bundleSource(spec),
+    ),
     centralSupply: await importSpec('@agoric/vats/src/centralSupply.js').then(
-      bundleSource,
+      spec => bundleSource(spec),
     ),
   };