diff --git a/package.json b/package.json
index 566099bb41..c332c9fc03 100644
--- a/package.json
+++ b/package.json
@@ -97,5 +97,8 @@
     "@types/react-dom": "^19.0.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0"
+  },
+  "engines": {
+    "bun": "1.4.4"
   }
 }
diff --git a/scripts/verify-packed-manifests.mjs b/scripts/verify-packed-manifests.mjs
index bc57ed57d7..fc6ea3a09a 100644
--- a/scripts/verify-packed-manifests.mjs
+++ b/scripts/verify-packed-manifests.mjs
@@ -479,7 +479,15 @@ function writeConsumerFixture(packDir, packedWorkspaces) {
 export const CONSUMER_MIN_RELEASE_AGE_SECONDS = 24 * 60 * 60;
 
 const BLOCKED_BY_AGE =
-  /No version matching "[^"]+" found for specifier "([^"]+)" \(blocked by minimum-release-age/g;
+  /No version matching "([^"]+)" found for specifier "([^"]+)" \(blocked by minimum-release-age/g;
+
+/** Packages bun refused as too new, or null when its output does not pair a name with a range. */
+export function ageBlockedPackages(stderr) {
+  const names = [...stderr.matchAll(BLOCKED_BY_AGE)].map(([, a, b]) =>
+    [a, b].find((name) => stderr.includes(`${name}@${name === a ? b : a} failed to resolve`)),
+  );
+  return names.length && names.every(Boolean) ? names : null;
+}
 
 export function installConsumer(dir, { args = [], env = process.env } = {}) {
   const install = () =>
@@ -498,8 +506,8 @@ export function installConsumer(dir, { args = [], env = process.env } = {}) {
   } catch (error) {
     // A same-day dependency bump: every version its range allows is younger than the age, and the repo
     // installed it already, so its tarball is served. Only those packages skip the age.
-    const blocked = [...`${error.stderr ?? ""}`.matchAll(BLOCKED_BY_AGE)].map((m) => m[1]);
-    if (!blocked.length) throw error;
+    const blocked = ageBlockedPackages(`${error.stderr ?? ""}`);
+    if (!blocked) throw error;
     console.log(`Consumer install: newer than the release age, allowed: ${blocked.join(", ")}`);
     writeFileSync(
       join(dir, "bunfig.toml"),
diff --git a/scripts/verify-packed-manifests.test.mjs b/scripts/verify-packed-manifests.test.mjs
index fb05b1a15c..06af0d7abe 100644
--- a/scripts/verify-packed-manifests.test.mjs
+++ b/scripts/verify-packed-manifests.test.mjs
@@ -7,6 +7,7 @@ import { dirname, join } from "node:path";
 import { describe, it } from "node:test";
 import { Worker } from "node:worker_threads";
 import {
+  ageBlockedPackages,
   CONSUMER_TSCONFIG,
   countTypeErrorsByPackage,
   installConsumer,
@@ -353,6 +354,30 @@ async function withRegistry(name, versions, run) {
   }
 }
 
+describe("ageBlockedPackages", () => {
+  const blockedBy = (first, second, name, range) =>
+    `Resolving dependencies\nerror: No version matching "${first}" found for specifier "${second}" (blocked by minimum-release-age: 86400 seconds)\nerror: ${name}@${range} failed to resolve\n`;
+
+  it("names the package whichever order bun quotes it in", () => {
+    assert.deepEqual(ageBlockedPackages(blockedBy("fake-dep", "^1.1.0", "fake-dep", "^1.1.0")), [
+      "fake-dep",
+    ]);
+    assert.deepEqual(ageBlockedPackages(blockedBy("^1.1.0", "fake-dep", "fake-dep", "^1.1.0")), [
+      "fake-dep",
+    ]);
+    assert.deepEqual(
+      ageBlockedPackages(blockedBy("^2.0.1", "@scope/pkg", "@scope/pkg", "^2.0.1")),
+      ["@scope/pkg"],
+    );
+  });
+
+  it("names none when bun's output does not say which token is the package", () => {
+    const unpaired = `error: No version matching "^1.1.0" found for specifier "fake-dep" (blocked by minimum-release-age: 86400 seconds)\n`;
+    assert.equal(ageBlockedPackages(unpaired), null);
+    assert.equal(ageBlockedPackages("error: fake-dep@^9.0.0 failed to resolve\n"), null);
+  });
+});
+
 describe("packed consumer install", () => {
   /** Installs `deps` into a fresh consumer against the registry; returns the installed fake-dep version. */
   function install(registry, dir, deps) {