<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>arianvanp</author><text>If you&amp;#x27;re not willing to install a whole new OS,  nix , the package manager of nixos, is standalone and can be run in a single user without interferring with system packages. It&amp;#x27;s a great way to familiarize yourself with the system. [0]&lt;p&gt;I use Nix together with ArchLinux now to set up consistent development environments and it has been great. It&amp;#x27;s also blazingly fast because of Hydra[1], their continious build system.&lt;p&gt;[0] &lt;a href=&quot;http://nixos.org/nix&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;nixos.org&amp;#x2F;nix&lt;/a&gt;
[1] &lt;a href=&quot;http://nixos.org/hydra&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;nixos.org&amp;#x2F;hydra&lt;/a&gt;</text><parent_chain></parent_chain></comment><story><title>NixOS 14.12 released</title><url>http://lists.science.uu.nl/pipermail/nix-dev/2014-December/015411.html</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>louwrentius</author><text>Many may wonder like me WTF is NixOS?&lt;p&gt;The key feature is &amp;#x27;declarative system configuration&amp;#x27;. Sort of Puppet&amp;#x2F;Chef&amp;#x2F;Ansible&amp;#x2F;CFengine build-in. Heavily oriented on DevOPs culture.&lt;p&gt;The OS allows you to test package installs without the fear of breaking the system. You can always roll back to a previous known-good state.</text><parent_chain></parent_chain></comment><story><title>NixOS 14.12 released</title><url>http://lists.science.uu.nl/pipermail/nix-dev/2014-December/015411.html</url></story>