diff --git a/script/lib/create-windows-installer.js b/script/lib/create-windows-installer.js
index 6f5d87c1d..d30c9cd5c 100644
--- a/script/lib/create-windows-installer.js
+++ b/script/lib/create-windows-installer.js
@@ -7,6 +7,9 @@ const path = require('path');
 
 const CONFIG = require('../config');
 
+const REPO_OWNER = process.env.REPO_OWNER || 'atom';
+const MAIN_REPO = process.env.MAIN_REPO || 'atom';
+
 module.exports = packagedAppPath => {
   const archSuffix = process.arch === 'ia32' ? '' : '-' + process.arch;
   const updateUrlPrefix =
@@ -17,7 +20,7 @@ module.exports = packagedAppPath => {
     exe: CONFIG.executableName,
     appDirectory: packagedAppPath,
     authors: 'GitHub Inc.',
-    iconUrl: `https://raw.githubusercontent.com/atom/atom/master/resources/app-icons/${
+    iconUrl: `https://raw.githubusercontent.com/${REPO_OWNER}/${MAIN_REPO}/master/resources/app-icons/${
       CONFIG.channel
     }/atom.ico`,
     loadingGif: path.join(
diff --git a/script/lib/update-dependency/git.js b/script/lib/update-dependency/git.js
index a9f8843fe..26d226a2d 100644
--- a/script/lib/update-dependency/git.js
+++ b/script/lib/update-dependency/git.js
@@ -1,3 +1,6 @@
+const REPO_OWNER = process.env.REPO_OWNER || 'atom';
+const MAIN_REPO = process.env.MAIN_REPO || 'atom';
+
 const git = (git, repositoryRootPath) => {
   const path = require('path');
   const packageJsonFilePath = path.join(repositoryRootPath, 'package.json');
@@ -10,7 +13,7 @@ const git = (git, repositoryRootPath) => {
       if (!err && !remotes.map(({ name }) => name).includes('ATOM')) {
         git.addRemote(
           'ATOM',
-          `https://atom:${process.env.AUTH_TOKEN}@github.com/atom/atom.git/`
+          `https://atom:${process.env.AUTH_TOKEN}@github.com/${REPO_OWNER}/${MAIN_REPO}.git/`
         );
       }
     });
diff --git a/script/lib/update-dependency/pull-request.js b/script/lib/update-dependency/pull-request.js
index f10a3540d..a96d87779 100644
--- a/script/lib/update-dependency/pull-request.js
+++ b/script/lib/update-dependency/pull-request.js
@@ -1,13 +1,16 @@
 const { request } = require('@octokit/request');
 
+const REPO_OWNER = process.env.REPO_OWNER || 'atom';
+const MAIN_REPO = process.env.MAIN_REPO || 'atom';
+
 const requestWithAuth = request.defaults({
   baseUrl: 'https://api.github.com',
   headers: {
     'user-agent': 'atom',
     authorization: `token ${process.env.AUTH_TOKEN}`
   },
-  owner: 'atom',
-  repo: 'atom'
+  owner: REPO_OWNER,
+  repo: MAIN_REPO
 });
 
 module.exports = {
@@ -28,7 +31,7 @@ module.exports = {
   },
   findPR: async ({ moduleName, latest }, branch) => {
     return requestWithAuth('GET /search/issues', {
-      q: `${moduleName} type:pr ${moduleName}@${latest} in:title repo:atom/atom head:${branch} state:open`
+      q: `${moduleName} type:pr ${moduleName}@${latest} in:title repo:${REPO_OWNER}/${MAIN_REPO} head:${branch} state:open`
     });
   },
   addLabel: async pullRequestNumber => {