commit 18f953965598ab585cc4b3f9018463905401bdd9 · pyrox.dev/nixpkgs

+44
nixos/doc/manual/release-notes/rl-1809.xml
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          </listitem>

     

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          <listitem>

     

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           <para>

     

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            The minimum version of Nix required to evaluate Nixpkgs is now 2.0.

     

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           </para>

     

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           <itemizedlist>

     

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            <listitem>

     

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             <para>

     

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              For users of NixOS 18.03, NixOS 18.03 defaulted to Nix 2.0, but

     

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              supported using Nix 1.11 by setting <literal>nix.package =

     

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              pkgs.nix1;</literal>. If this option is set to a Nix 1.11 package, you

     

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              will need to either unset the option or upgrade it to Nix 2.0.

     

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             </para>

     

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            </listitem>

     

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            <listitem>

     

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             <para>

     

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              For users of NixOS 17.09, you will first need to upgrade Nix by setting

     

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              <literal>nix.package = pkgs.nixStable2;</literal> and run

     

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              <command>nixos-rebuild switch</command> as the <literal>root</literal>

     

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              user.

     

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             </para>

     

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            </listitem>

     

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            <listitem>

     

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             <para>

     

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              For users of a daemon-less Nix installation on Linux or macOS, you can

     

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              upgrade Nix by running <command>curl https://nixos.org/nix/install |

     

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              sh</command>, or prior to doing a channel update, running

     

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              <command>nix-env -iA nix</command>.

     

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             </para>

     

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             <para>

     

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              If you have already run a channel update and Nix is no longer able to

     

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              evaluate Nixpkgs, the error message printed should provide adequate

     

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              directions for upgrading Nix.

     

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             </para>

     

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            </listitem>

     

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            <listitem>

     

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             <para>

     

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              For users of the Nix daemon on macOS, you can upgrade Nix by running

     

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              <command>sudo -i sh -c 'nix-channel --update &amp;&amp; nix-env -iA

     

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              nixpkgs.nix'; sudo launchctl stop org.nixos.nix-daemon; sudo launchctl

     

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              start org.nixos.nix-daemon</command>.

     

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             </para>

     

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            </listitem>

     

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           </itemizedlist>

     

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          </listitem>

     

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          <listitem>

     

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           <para>

     

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            <literal>lib.strict</literal> is removed. Use

     

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            <literal>builtins.seq</literal> instead.

     

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           </para>