diff --git a/build/office-engine-resolution.mjs b/build/office-engine-resolution.mjs
index a0d1a33ed..713f59832 100644
--- a/build/office-engine-resolution.mjs
+++ b/build/office-engine-resolution.mjs
@@ -26,8 +26,12 @@ export function packagedArchiveRoot(dshEntryPath) {
  * Hooks apply to this thread only.
  */
 export function registerOfficeEngineResolution(dshEntryPath) {
-  const archive = packagedArchiveRoot(dshEntryPath)
-  if (archive === undefined) return undefined
+  const entryArchive = packagedArchiveRoot(dshEntryPath)
+  if (entryArchive === undefined) return undefined
+  // Compare canonical paths on both sides, as upstream does: resolved URLs are
+  // realpath'd below, and the entry path can differ in spelling (a symlinked
+  // or junctioned install directory, Windows 8.3 names or drive-letter case).
+  const archive = realpathSync(entryArchive)
   const engines = join(archive, 'node_modules', '@deepseek-ai', 'libreoffice-kit-')
   const source = pathToFileURL(engines).href
   const destination = pathToFileURL(join(`${archive}.unpacked`, 'node_modules', '@deepseek-ai', 'libreoffice-kit-')).href
diff --git a/test/office-engine-resolution.test.ts b/test/office-engine-resolution.test.ts
index c5128dd0e..8d9a83c39 100644
--- a/test/office-engine-resolution.test.ts
+++ b/test/office-engine-resolution.test.ts
@@ -1,8 +1,8 @@
 import { spawnSync } from 'node:child_process'
-import { mkdir, mkdtemp, realpath, rm, writeFile } from 'node:fs/promises'
+import { mkdir, mkdtemp, realpath, rm, symlink, writeFile } from 'node:fs/promises'
 import { createRequire } from 'node:module'
 import { tmpdir } from 'node:os'
-import { join } from 'node:path'
+import { dirname, join } from 'node:path'
 import { pathToFileURL } from 'node:url'
 import { afterEach, describe, expect, it } from 'vitest'
 import { packagedArchiveRoot, registerOfficeEngineResolution } from '../build/office-engine-resolution.mjs'
@@ -63,6 +63,18 @@ describe('Office engine resolution', () => {
     expect(resolveEngine(archive, entry)).toBe(join(`${archive}.unpacked`, 'node_modules', ENGINE, 'package.json'))
   })
 
+  it('matches when the entry path names the install directory through a link', async () => {
+    // Resolved URLs are canonical; the entry path may not be (a symlinked or
+    // junctioned install, Windows 8.3 names). Without canonicalizing the
+    // archive the hook never matched and the engine stayed inside app.asar.
+    const { archive } = await packagedLayout()
+    const linked = join(dirname(dirname(archive)), 'Linked Resources')
+    await symlink(dirname(archive), linked, process.platform === 'win32' ? 'junction' : 'dir')
+    const linkedArchive = join(linked, 'app.asar')
+    const entry = join(linkedArchive, 'node_modules', '@deepseek-ai', 'dsh', 'lib', 'bin.js')
+    expect(resolveEngine(linkedArchive, entry)).toBe(join(`${archive}.unpacked`, 'node_modules', ENGINE, 'package.json'))
+  })
+
   it('installs nothing outside an app.asar installation', () => {
     expect(registerOfficeEngineResolution('/repo/node_modules/@deepseek-ai/dsh/lib/bin.js')).toBeUndefined()
   })