--- a/testing/taskcluster/scripts/phone-builder/pre-build.sh
+++ b/testing/taskcluster/scripts/phone-builder/pre-build.sh
@@ -26,21 +26,16 @@ tc-vcs repo-checkout $WORKSPACE/B2G http
 rm -f $WORKSPACE/B2G/gecko
 ln -s $WORKSPACE/gecko $WORKSPACE/B2G/gecko
 
 debug_flag=""
 if [ 0$B2G_DEBUG -ne 0 ]; then
   debug_flag='--debug'
 fi
 
-if ! aws --output=text s3 ls s3://b2g-phone-backups/$TARGET/; then
-    echo "The backup file is either invalid or missing! Are the AWS credentials ok?"
-    exit 1
-fi
-
 backup_file=$(aws --output=text s3 ls s3://b2g-phone-backups/$TARGET/ | tail -1 | awk '{print $NF}')
 
 if echo $backup_file | grep '\.tar\.bz2'; then
     aws s3 cp s3://b2g-phone-backups/$TARGET/$backup_file .
     tar -xjf $backup_file -C $WORKSPACE/B2G
     rm -f $backup_file
 fi