diff --git a/challenges/vibe-coding-mad-libs/install b/challenges/vibe-coding-mad-libs/install
index d95b125..2a6365a 100755
--- a/challenges/vibe-coding-mad-libs/install
+++ b/challenges/vibe-coding-mad-libs/install
@@ -3,5 +3,6 @@
 # versions boothstrap's Pi uses, into this package's node_modules.
 set -eu
 
-package_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+# pwd -P resolves symlinks: npm ci fails on a --prefix that isn't a real path.
+package_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd -P)
 npm ci --ignore-scripts --no-audit --no-fund --prefix "$package_dir"
diff --git a/test/vibe-coding-mad-libs.test.mjs b/test/vibe-coding-mad-libs.test.mjs
index e816196..7617eaa 100644
--- a/test/vibe-coding-mad-libs.test.mjs
+++ b/test/vibe-coding-mad-libs.test.mjs
@@ -4,7 +4,7 @@
 
 import assert from 'node:assert/strict'
 import { spawn } from 'node:child_process'
-import { cp, link, mkdtemp, readFile, rm, stat, writeFile } from 'node:fs/promises'
+import { cp, link, mkdtemp, readFile, rm, stat, symlink, writeFile } from 'node:fs/promises'
 import { createServer, get } from 'node:http'
 import { tmpdir } from 'node:os'
 import path from 'node:path'
@@ -211,10 +211,13 @@ for (const { name, text, finished } of finishedPromptCases) {
   })
 }
 
-test('loads the extension under the pinned Pi packages after install', { timeout: installTimeoutMilliseconds + 60_000 }, async (context) => {
+test('loads the extension under the pinned Pi packages after install through a symlink', { timeout: installTimeoutMilliseconds + 60_000 }, async (context) => {
   const installedPackage = path.join(await makeTemporaryDirectory(context), 'package')
   await cp(packageDirectory, installedPackage, { recursive: true, filter: (source) => path.basename(source) !== 'node_modules' })
-  const installed = await runExecutable(path.join(installedPackage, 'install'), [], { timeout: installTimeoutMilliseconds })
+  // A station can reach its package through a symlink, as macOS's /tmp is one.
+  const linkedPackage = path.join(await makeTemporaryDirectory(context), 'linked-package')
+  await symlink(installedPackage, linkedPackage)
+  const installed = await runExecutable(path.join(linkedPackage, 'install'), [], { timeout: installTimeoutMilliseconds })
   assert.equal(installed.code, 0, installed.stderr)
   const projectDirectory = await makeTemporaryDirectory(context)
   const agentDirectory = await makeTemporaryDirectory(context)