doc/manual/installation/upgrading.xml


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<chapter xmlns="http://docbook.org/ns/docbook"
      xmlns:xlink="http://www.w3.org/1999/xlink"
      xmlns:xi="http://www.w3.org/2001/XInclude"
      version="5.0"
      xml:id="ch-upgrading-nix">

  <title>Upgrading Nix</title>

  <para>
    Multi-user Nix users on macOS can upgrade Nix by running:
    <command>sudo -i sh -c 'nix-channel --update &amp;&amp;
    nix-env -iA nixpkgs.nix &amp;&amp;
    launchctl remove org.nixos.nix-daemon &amp;&amp;
    launchctl load /Library/LaunchDaemons/org.nixos.nix-daemon.plist'</command>
  </para>


  <para>
    Single-user installations of Nix should run this:
    <command>nix-channel --update; nix-env -iA nixpkgs.nix nixpkgs.cacert</command>
  </para>
      
  <para>
    Multi-user Nix users on Linux should run this with sudo:
    <command>nix-channel --update; nix-env -iA nixpkgs.nix nixpkgs.cacert; systemctl daemon-reload; systemctl restart nix-daemon</command>
  </para>
</chapter>