Well, we keep an eye on what gets pulled in when installing from non-default repos. It hasn&#x27;t yet ever happened that pulling in a small, single package from Debian unstable has overrode too many Debian stable packages, only the ones related to it.<p>There&#x27;s a lot of difference between &quot;unstable&quot; and &quot;Debian unstable&quot;. The latter is actually quite stable (which may be why Ubuntu feels safe enough to build on it). Breaking libc is a major step, and Debian wouldn&#x27;t take such a step lightly. It rarely happens even with rolling release distros – and in the case of Debian – the true rolling, unstable distro is Debian testing. Before such a things rolls into Debian unstable, we&#x27;ve already received ample notice.<p>----<p>&gt; which have had fun bugs in the past like ...<p>I think those were just bugs. They didn&#x27;t happen because they were in unstable, and even stable has had nasty bugs.