diff --git a/action.yml b/action.yml
index 405f9b7..dc1e7a3 100644
--- a/action.yml
+++ b/action.yml
@@ -23,6 +23,7 @@ inputs:
   source-pr:
     description: The PR of `magic-nix-cache` to use. Conflicts with all other `source-*` options.
     required: false
+    default: 1
   source-revision:
     description: The revision of `nix-magic-nix-cache` to use. Conflicts with all other `source-*` options.
     required: false
diff --git a/bin/X64-Linux b/bin/X64-Linux
deleted file mode 100755
index 492bd22..0000000
Binary files a/bin/X64-Linux and /dev/null differ
diff --git a/dist/index.js b/dist/index.js
index 19765b1..4256df1 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -7,7 +7,6 @@ import { openSync, createWriteStream } from 'node:fs';
 import { pipeline } from 'node:stream/promises';
 import { setTimeout as setTimeout$1 } from 'timers/promises';
 import { promisify as promisify$1, inspect } from 'node:util';
-import require$$0$5, { fileURLToPath } from 'url';
 import require$$0 from 'os';
 import require$$1 from 'fs';
 import crypto from 'crypto';
@@ -34,6 +33,7 @@ import { checkServerIdentity } from 'node:tls';
 import https$4 from 'node:https';
 import { lookup, V4MAPPED, ALL, ADDRCONFIG, promises } from 'node:dns';
 import require$$3 from 'http2';
+import require$$0$5 from 'url';
 
 var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
 
@@ -12120,7 +12120,7 @@ function getCacherUrl() {
     const runnerArch = process.env.RUNNER_ARCH;
     const runnerOs = process.env.RUNNER_OS;
     const binarySuffix = `${runnerArch}-${runnerOs}`;
-    const urlPrefix = `https://install.determinate.systems/magic-nix-cache`;
+    const urlPrefix = `https://magic-nix-cache-priv20231208150408868500000001.s3.us-east-2.amazonaws.com`;
     if (coreExports.getInput('source-url')) {
         return coreExports.getInput('source-url');
     }
@@ -12128,7 +12128,7 @@ function getCacherUrl() {
         return `${urlPrefix}/tag/${coreExports.getInput('source-tag')}/${binarySuffix}`;
     }
     if (coreExports.getInput('source-pr')) {
-        return `${urlPrefix}/pr/${coreExports.getInput('source-pr')}/${binarySuffix}`;
+        return `${urlPrefix}/pr_${coreExports.getInput('source-pr')}/magic-nix-cache-${binarySuffix}`;
     }
     if (coreExports.getInput('source-branch')) {
         return `${urlPrefix}/branch/${coreExports.getInput('source-branch')}/${binarySuffix}`;
@@ -12144,18 +12144,9 @@ async function fetchAutoCacher(destination) {
         mode: 0o755,
     });
     const binary_url = getCacherUrl();
-    coreExports.debug(`Fetching the Magic Nix Cache from ${binary_url}`);
+    coreExports.info(`Fetching the Magic Nix Cache from ${binary_url}`);
     return pipeline(gotClient.stream(binary_url), stream);
 }
-async function fileExists(path) {
-    try {
-        await fs$2.access(path, fs$2.constants.F_OK);
-        return true;
-    }
-    catch (err) {
-        return false;
-    }
-}
 async function setUpAutoCache() {
     const tmpdir = process.env['RUNNER_TEMP'] || os$2.tmpdir();
     const required_env = ['ACTIONS_CACHE_URL', 'ACTIONS_RUNTIME_URL', 'ACTIONS_RUNTIME_TOKEN'];
@@ -12171,11 +12162,8 @@ async function setUpAutoCache() {
     }
     coreExports.debug(`GitHub Action Cache URL: ${process.env['ACTIONS_CACHE_URL']}`);
     const daemonDir = await fs$2.mkdtemp(path$1.join(tmpdir, 'magic-nix-cache-'));
-    const __filename = fileURLToPath(import.meta.url);
-    const __dirname = path$1.dirname(__filename);
-    var daemonBin = path$1.join(__dirname, "../bin/X64-Linux");
-    if (await fileExists(daemonBin)) ;
-    else if (coreExports.getInput('source-binary')) {
+    var daemonBin;
+    if (coreExports.getInput('source-binary')) {
         daemonBin = coreExports.getInput('source-binary');
     }
     else {
@@ -12203,7 +12191,7 @@ async function setUpAutoCache() {
         '--nix-conf', `${process.env["HOME"]}/.config/nix/nix.conf`
     ].concat(coreExports.getInput('use-flakehub') === 'true' ? [
         '--use-flakehub',
-        '--attic-server', coreExports.getInput('attic-server'),
+        '--flakehub-cache-server', coreExports.getInput('flakehub-cache-server'),
         '--flakehub-api-server', coreExports.getInput('flakehub-api-server'),
         '--flakehub-api-server-netrc', path$1.join(process.env['RUNNER_TEMP'], 'determinate-nix-installer-netrc'),
     ] : []).concat(coreExports.getInput('use-gha-cache') === 'true' ? [
diff --git a/src/index.ts b/src/index.ts
index cc56a3d..406f927 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -8,7 +8,6 @@ import { createWriteStream, openSync } from 'node:fs';
 import { pipeline } from 'node:stream/promises';
 import { setTimeout } from 'timers/promises';
 import { inspect } from 'node:util';
-import { fileURLToPath } from 'url';
 
 import * as core from '@actions/core';
 import { Tail } from 'tail';
@@ -35,7 +34,7 @@ function getCacherUrl() : string {
   const runnerArch = process.env.RUNNER_ARCH;
   const runnerOs = process.env.RUNNER_OS;
   const binarySuffix = `${runnerArch}-${runnerOs}`;
-  const urlPrefix = `https://install.determinate.systems/magic-nix-cache`;
+  const urlPrefix = `https://magic-nix-cache-priv20231208150408868500000001.s3.us-east-2.amazonaws.com`;
 
   if (core.getInput('source-url')) {
     return core.getInput('source-url');
@@ -46,7 +45,7 @@ function getCacherUrl() : string {
   }
 
   if (core.getInput('source-pr')) {
-    return `${urlPrefix}/pr/${core.getInput('source-pr')}/${binarySuffix}`;
+    return `${urlPrefix}/pr_${core.getInput('source-pr')}/magic-nix-cache-${binarySuffix}`;
   }
 
   if (core.getInput('source-branch')) {
@@ -67,7 +66,7 @@ async function fetchAutoCacher(destination: string) {
   });
 
   const binary_url = getCacherUrl();
-  core.debug(`Fetching the Magic Nix Cache from ${binary_url}`);
+  core.info(`Fetching the Magic Nix Cache from ${binary_url}`);
 
   return pipeline(
     gotClient.stream(binary_url),
@@ -75,15 +74,6 @@ async function fetchAutoCacher(destination: string) {
   );
 }
 
-async function fileExists(path: string) {
-  try {
-    await fs.access(path, fs.constants.F_OK);
-    return true;
-  } catch (err) {
-    return false;
-  }
-}
-
 async function setUpAutoCache() {
   const tmpdir = process.env['RUNNER_TEMP'] || os.tmpdir();
   const required_env = ['ACTIONS_CACHE_URL', 'ACTIONS_RUNTIME_URL', 'ACTIONS_RUNTIME_TOKEN'];
@@ -104,12 +94,8 @@ async function setUpAutoCache() {
 
   const daemonDir = await fs.mkdtemp(path.join(tmpdir, 'magic-nix-cache-'));
 
-  const __filename = fileURLToPath(import.meta.url);
-  const __dirname = path.dirname(__filename);
-
-  var daemonBin: string = path.join(__dirname, "../bin/X64-Linux");
-  if (await fileExists(daemonBin)) {
-  } else if (core.getInput('source-binary')) {
+  var daemonBin: string;
+  if (core.getInput('source-binary')) {
     daemonBin = core.getInput('source-binary');
   } else {
     daemonBin = `${daemonDir}/magic-nix-cache`;