Hey y’all 
I get this error when building a Meteor 1.4.2 app with a custom Meteor package, which depends on the npm module html-to-text:
Npm.depends({
'html-to-text': '2.1.3'
});
On build:
W20161116-12:53:47.977(-5)? (STDERR) /Users/Johan/.meteor/packages/meteor-tool/.1.4.2_1.qdgwv6++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:280
W20161116-12:53:47.977(-5)? (STDERR) throw(ex);
W20161116-12:53:47.978(-5)? (STDERR) ^
W20161116-12:53:47.978(-5)? (STDERR)
W20161116-12:53:47.978(-5)? (STDERR) Error: Cannot find module 'underscore'
W20161116-12:53:47.979(-5)? (STDERR) at Function.Module._resolveFilename (module.js:325:15)
W20161116-12:53:47.980(-5)? (STDERR) at Function.Module._load (module.js:276:25)
W20161116-12:53:47.980(-5)? (STDERR) at Module.require (module.js:353:17)
W20161116-12:53:47.981(-5)? (STDERR) at require (internal/module.js:12:17)
W20161116-12:53:47.981(-5)? (STDERR) at Object.<anonymous> (/Users/Johan/.meteor/packages/lookback_emails/.0.7.6.1q437in++os+web.browser+web.cordova/npm/node_modules1/html-to-text/lib/html-to-text.js:4:9)
W20161116-12:53:47.982(-5)? (STDERR) at Module._compile (module.js:409:26)
It comes from within my html-to-text dependency:
$ head -n 5 /Users/Johan/.meteor/packages/lookback_emails/.0.7.6.1q437in++os+web.browser+web.cordova/npm/node_modules1/html-to-text/lib/html-to-text.js
var fs = require('fs');
var util = require('util');
var _ = require('underscore');
var _s = require('underscore.string');
Nothing fishy there. Is Meteor doing something funny when parsing this? I heard from @tmeasday that Meteor build tool is parsing all require calls in packages/npm modules.