&gt;To build a version of master, you have a gemfile &#x2F; package.json that, if it follows specifications, will correctly tell you everything, down to the version, that should be installed.<p>You <i>can</i> set specific versions, but the default behavior is to do &gt;= or ~ versions, at least in Node. But you could potentially go in and change the references to =version# to get a version closer to the one the developer built -- but even then there&#x27;s no guarantee that the latest build hasn&#x27;t had a more recent download of the packages, with newer versions than those specified in package.json.<p>But I didn&#x27;t know this about go package importing. I&#x27;m a bit disappointed that they didn&#x27;t at least make it possible to import @ a particular hash.<p>You <i>could</i> look at the last check-in and pull versions of each of the dependent repos as of that date, if the latest builds don&#x27;t work.<p>&gt;&quot;experienced&quot; and &quot;NodeJS&quot; don&#x27;t go together so often in my book<p>Touche.<p>But I&#x27;ve encountered similar issues with Ruby, TBH (allegedly senior developers who turn out to be slow and not as experienced as I had hoped), and it happens that the JavaScript developers I have around me seem stronger than the Ruby developers. But more and more developers are training every year; I read one article that alleged that junior developers outnumber senior by a factor of something like 18-1 at this point. So I&#x27;m statistically likely to be surrounded by an insulating layer of junior developers no matter the language I choose. :)