diff --git a/js-build/note-editor.js b/js-build/note-editor.js
index 1435730342..6eebb10c50 100644
--- a/js-build/note-editor.js
+++ b/js-build/note-editor.js
@@ -12,8 +12,7 @@ async function getZoteroNoteEditor(signatures) {
 
 	const modulePath = path.join(__dirname, '..', 'note-editor');
 
-	const { stdout } = await exec('git rev-parse HEAD', { cwd: modulePath });
-	const hash = stdout.trim();
+	const hash = '';
 
 	if (!('note-editor' in signatures) || signatures['note-editor'].hash !== hash) {
 		const targetDir = path.join(__dirname, '..', 'build', 'resource', 'note-editor');
diff --git a/js-build/pdf-worker.js b/js-build/pdf-worker.js
index b820304f3a..6bbd0708c9 100644
--- a/js-build/pdf-worker.js
+++ b/js-build/pdf-worker.js
@@ -12,8 +12,7 @@ async function getPDFWorker(signatures) {
 
 	const modulePath = path.join(__dirname, '..', 'pdf-worker');
 
-	const { stdout } = await exec('git rev-parse HEAD', { cwd: modulePath });
-	const hash = stdout.trim();
+	const hash = '';
 
 	if (!('pdf-worker' in signatures) || signatures['pdf-worker'].hash !== hash) {
 		const targetDir = path.join(__dirname, '..', 'build', 'chrome', 'content', 'zotero', 'xpcom', 'pdfWorker');
diff --git a/js-build/reader.js b/js-build/reader.js
index 67a02a3ad2..2127f680df 100644
--- a/js-build/reader.js
+++ b/js-build/reader.js
@@ -12,8 +12,7 @@ async function getReader(signatures) {
 
 	const modulePath = path.join(__dirname, '..', 'reader');
 	
-	const { stdout } = await exec('git rev-parse HEAD', { cwd: modulePath });
-	const hash = stdout.trim();
+	const hash = '';
 	
 	if (!('reader' in signatures) || signatures['reader'].hash !== hash) {
 		const targetDir = path.join(__dirname, '..', 'build', 'resource', 'reader');