diff --git a/scripts/patch-actor-aliases-successor.mjs b/scripts/patch-actor-aliases-successor.mjs
index fd9b772b..23a283ec 100644
--- a/scripts/patch-actor-aliases-successor.mjs
+++ b/scripts/patch-actor-aliases-successor.mjs
@@ -4,24 +4,20 @@
  * - Add movedTo → personOptions.successor              (Fedify uses 'successor')
  */
 
-import { readFileSync, writeFileSync } from "node:fs";
-import { createRequire } from "node:module";
+import { access, readFile, writeFile } from "node:fs/promises";
 
-const require = createRequire(import.meta.url);
-const pkg = require.resolve("@rmdes/indiekit-endpoint-activitypub/lib/federation-setup.js");
-let src = readFileSync(pkg, "utf-8");
+const candidates = [
+  "node_modules/@rmdes/indiekit-endpoint-activitypub/lib/federation-setup.js",
+  "node_modules/@indiekit/indiekit/node_modules/@rmdes/indiekit-endpoint-activitypub/lib/federation-setup.js",
+];
 
 const MARKER = "// patch-actor-aliases-successor: applied";
-if (src.includes(MARKER)) {
-  console.log("[patch-actor-aliases-successor] Already applied");
-  process.exit(0);
-}
 
-// Fix 1: alsoKnownAs → aliases
-const OLD_ALIASES = `  if (profile.alsoKnownAs?.length > 0) {
+const OLD = `  if (profile.alsoKnownAs?.length > 0) {
     personOptions.alsoKnownAs = profile.alsoKnownAs.map((u) => new URL(u));
   }`;
-const NEW_ALIASES = `  if (profile.alsoKnownAs?.length > 0) {
+
+const NEW = `  if (profile.alsoKnownAs?.length > 0) {
     personOptions.aliases = profile.alsoKnownAs.map((u) => new URL(u));
   }
   if (profile.movedTo) {
@@ -29,11 +25,29 @@ const NEW_ALIASES = `  if (profile.alsoKnownAs?.length > 0) {
   }
   ${MARKER}`;
 
-if (!src.includes(OLD_ALIASES)) {
-  console.error("[patch-actor-aliases-successor] Could not find target block — check federation-setup.js version");
-  process.exit(1);
+async function exists(p) {
+  try { await access(p); return true; } catch { return false; }
 }
 
-src = src.replace(OLD_ALIASES, NEW_ALIASES);
-writeFileSync(pkg, src, "utf-8");
-console.log("[patch-actor-aliases-successor] Applied: alsoKnownAs→aliases, added movedTo→successor");
+let patched = false;
+for (const filePath of candidates) {
+  if (!(await exists(filePath))) continue;
+  const src = await readFile(filePath, "utf8");
+  if (src.includes(MARKER)) {
+    console.log(`[postinstall] patch-actor-aliases-successor: already applied in ${filePath}`);
+    patched = true;
+    break;
+  }
+  if (!src.includes(OLD)) {
+    console.log(`[postinstall] patch-actor-aliases-successor: target not found in ${filePath}`);
+    continue;
+  }
+  await writeFile(filePath, src.replace(OLD, NEW), "utf8");
+  console.log(`[postinstall] patch-actor-aliases-successor: applied to ${filePath}`);
+  patched = true;
+  break;
+}
+
+if (!patched) {
+  console.log("[postinstall] patch-actor-aliases-successor: no target file found");
+}