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https://github.com/NixOS/nix
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a4d33e816e
* Improve documentation around upgrading nix, add replacing nix channel with new one Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
49 lines
1.6 KiB
Markdown
49 lines
1.6 KiB
Markdown
# Upgrading Nix
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> **Note**
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>
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> These upgrade instructions apply for regular Linux distributions where Nix was installed following the [installation instructions in this manual](./index.md).
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First, find the name of the current [channel](@docroot@/command-ref/nix-channel.md) through which Nix is distributed:
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```console
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$ nix-channel --list
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```
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By default this should return an entry for Nixpkgs:
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```console
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nixpkgs https://nixos.org/channels/nixpkgs-23.05
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```
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Check which Nix version will be installed:
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```console
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$ nix-shell -p nix -I nixpkgs=channel:nixpkgs-23.11 --run "nix --version"
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nix (Nix) 2.18.1
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```
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> **Warning**
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>
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> Writing to the [local store](@docroot@/store/types/local-store.md) with a newer version of Nix, for example by building derivations with `nix-build` or `nix-store --realise`, may change the database schema!
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> Reverting to an older version of Nix may therefore require purging the store database before it can be used.
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Update the channel entry:
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```console
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$ nix-channel --remove nixpkgs
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$ nix-channel --add https://nixos.org/channels/nixpkgs-23.11 nixpkgs
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```
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Multi-user Nix users on macOS can upgrade Nix by running: `sudo -i sh -c
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'nix-channel --update &&
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nix-env --install --attr nixpkgs.nix &&
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launchctl remove org.nixos.nix-daemon &&
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launchctl load /Library/LaunchDaemons/org.nixos.nix-daemon.plist'`
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Single-user installations of Nix should run this: `nix-channel --update;
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nix-env --install --attr nixpkgs.nix nixpkgs.cacert`
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Multi-user Nix users on Linux should run this with sudo: `nix-channel
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--update; nix-env --install --attr nixpkgs.nix nixpkgs.cacert; systemctl
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daemon-reload; systemctl restart nix-daemon`
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