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<ol class="chapter"><li class="chapter-item expanded "><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li class="chapter-item expanded "><a href="../start/quick-start.html"><strong aria-hidden="true">2.</strong> Quick Start</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../start/iso.html"><strong aria-hidden="true">2.1.</strong> ISO</a></li><li class="chapter-item expanded "><a href="../start/from-nixos.html"><strong aria-hidden="true">2.2.</strong> From NixOS</a></li></ol></li><li class="chapter-item expanded "><a href="../layout/layout.html"><strong aria-hidden="true">3.</strong> Layout</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../layout/hosts.html" class="active"><strong aria-hidden="true">3.1.</strong> Hosts</a></li><li class="chapter-item expanded "><a href="../layout/profiles.html"><strong aria-hidden="true">3.2.</strong> Profiles</a></li><li class="chapter-item expanded "><a href="../layout/suites.html"><strong aria-hidden="true">3.3.</strong> Suites</a></li><li class="chapter-item expanded "><a href="../layout/users.html"><strong aria-hidden="true">3.4.</strong> Users</a></li><li class="chapter-item expanded "><a href="../layout/cachix.html"><strong aria-hidden="true">3.5.</strong> Cachix</a></li></ol></li></ol>
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<h1><a class="header" href="#hosts" id="hosts">Hosts</a></h1>
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<p>Nix flakes contain an output called <code>nixosConfigurations</code> declaring an
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attribute set of valid NixOS systems. To simplify the management and creation
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of these hosts, nixflk automatically imports every <code>*.nix</code> file inside this
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directory to the mentioned attribute set, applying the projects defaults to
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each. The only hard requirement is that the file contain a valid NixOS module.</p>
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<p>As an example, a file <code>hosts/system.nix</code> will be available via the flake
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output <code>nixosConfigurations.system</code>. You can have as many hosts as you want
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and all of them will be automatically imported based on their name.</p>
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<p>For each host, the configuration automatically sets the <code>networking.hostName</code>
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attribute to the name of the file minus the <code>.nix</code> extension. This is for
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convenience, since <code>nixos-rebuild</code> automatically searches for a configuration
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matching the current systems hostname if one is not specified explicitly.</p>
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<p>It is recommended that the host modules only contain configuration information
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specific to a particular piece of hardware. Anything reusable across machines
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is best saved for <a href="./profiles.html">profile modules</a>.</p>
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<p>This is a good place to import sets of profiles, called <a href="./suites.html">suites</a>,
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that you intend to use on your machine.</p>
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<p>Additionally, this is the perfect place to import anything you might need from
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the <a href="https://github.com/NixOS/nixos-hardware">nixos-hardware</a> repository.</p>
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<h2><a class="header" href="#example" id="example">Example</a></h2>
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<p><code>hosts/librem.nix</code>:</p>
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<pre><code class="language-nix">{ suites, hardware, ... }:
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{
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imports = suites.laptop ++ [ hardware.purism-librem-13v3 ];
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boot.loader.systemd-boot.enable = true;
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boot.loader.efi.canTouchEfiVariables = true;
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fileSystems."/" = { device = "/dev/disk/by-label/nixos"; };
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}
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</code></pre>
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