diff --git a/github-dashboard/issueReport.js b/github-dashboard/issueReport.js
index 7c60c5c2..84a2f684 100644
--- a/github-dashboard/issueReport.js
+++ b/github-dashboard/issueReport.js
@@ -14,7 +14,7 @@
  * @author Agustín Vallejo (PhET Interactive Simulations)
  */
 
-const buildLocal = require( '../../perennial-alias/js/common/buildLocal.js' );
+const buildLocal = require( '../../perennial-alias/js/common/buildLocal' );
 const { Octokit } = require( 'octokit' );
 const octokit = new Octokit( {
   auth: buildLocal.phetDevGitHubAccessToken
diff --git a/github-labels/printGithubAuthorization.js b/github-labels/printGithubAuthorization.js
index 1cc0af9b..62f6d534 100644
--- a/github-labels/printGithubAuthorization.js
+++ b/github-labels/printGithubAuthorization.js
@@ -1,6 +1,6 @@
 // Copyright 2020, University of Colorado Boulder
 // @author Michael Kauzmann (PhET Interactive Simulations)
 
-const buildLocal = require( '../../perennial/js/common/buildLocal.js' );
+const buildLocal = require( '../../perennial/js/common/buildLocal' );
 
 console.log( `${buildLocal.developerGithubUsername}:${buildLocal.developerGithubAccessToken}` );
\ No newline at end of file
diff --git a/github-labels/update-repos-list.js b/github-labels/update-repos-list.js
index 8b596bc1..2817bf70 100644
--- a/github-labels/update-repos-list.js
+++ b/github-labels/update-repos-list.js
@@ -7,7 +7,7 @@
 // @author Matt Pennington (PhET Interactive Simulations)
 
 const axios = require( '../../perennial/node_modules/axios' );
-const buildLocal = require( '../../perennial/js/common/buildLocal.js' );
+const buildLocal = require( '../../perennial/js/common/buildLocal' );
 const fs = require( 'fs' );
 
 ( async () => {
diff --git a/project-management/reportEpicIssuesNotInSpreadsheet.js b/project-management/reportEpicIssuesNotInSpreadsheet.js
index 74c3cd41..7bad9aa8 100644
--- a/project-management/reportEpicIssuesNotInSpreadsheet.js
+++ b/project-management/reportEpicIssuesNotInSpreadsheet.js
@@ -21,7 +21,7 @@
  */
 
 const _ = require( '../../perennial/node_modules/lodash' );
-const buildLocal = require( '../../perennial/js/common/buildLocal.js' );
+const buildLocal = require( '../../perennial/js/common/buildLocal' );
 const https = require( 'https' );
 
 const linksInSpreadsheet = [];
diff --git a/sim-info/areAllReposInFile.js b/sim-info/areAllReposInFile.js
index fc2930ec..96330da9 100644
--- a/sim-info/areAllReposInFile.js
+++ b/sim-info/areAllReposInFile.js
@@ -9,7 +9,7 @@
  *
  * @author Michael Kauzmann (PhET Interactive Simulations)
  */
-const getAllRepos = require( './getAllRepos.js' );
+const getAllRepos = require( './getAllRepos' );
 const fs = require( 'fs' );
 
 ( async () => {
diff --git a/sim-info/getAllRepos.js b/sim-info/getAllRepos.js
index 7e7e276c..16738efd 100644
--- a/sim-info/getAllRepos.js
+++ b/sim-info/getAllRepos.js
@@ -9,7 +9,7 @@
  * @author Michael Kauzmann (PhET Interactive Simulations)
  */
 
-const buildLocal = require( '../../perennial/js/common/buildLocal.js' );
+const buildLocal = require( '../../perennial/js/common/buildLocal' );
 const https = require( 'https' );
 
 const getSomeRepos = async pageNumber => {