apps/meteor/app/file-upload/lib/FileUploadBase.ts
import path from 'path';
import { UploadFS } from '../../../server/ufs';
// set ufs temp dir to $TMPDIR/ufs instead of /tmp/ufs if the variable is set
if ('TMPDIR' in process.env) {
UploadFS.config.tmpDir = path.join(process.env.TMPDIR || '', 'ufs');
}