&gt; OS&#x2F;system package manager (SPM): this is not why we are here today<p>Arguably, this might be already a wrong approach. Whatever you say, but this <i>is</i> a problem (and <i>is causing</i> problems) that I can do both `apt-get install python-mutagen` and `pip install mutagen`. But what I cannot do for sure at this point: get rid of one and only one of these tools. So before speaking about how can I fuck up writing some language-specific PM it might be fair to admit that pretty much nothing actually <i>is</i> language or project-specific when talking about computer systems, and consider why somebody might write another such tool when we&#x27;re done with our task.