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2.4 release notes: Add some migration notes

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Eelco Dolstra 2021-10-27 17:32:44 +02:00
parent 9559f74a99
commit 9c6ac9eb0e
1 changed files with 30 additions and 3 deletions
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doc/manual/src/release-notes/rl-2.4.md
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@ -1,4 +1,4 @@
# Release 2.4 (2021-10-XX)
# Release 2.4 (2021-11-01)
This is the first release in more than two years and is the result of
more than 2800 commits from 195 contributors since release 2.3.
@ -286,8 +286,35 @@ more than 2800 commits from 195 contributors since release 2.3.
to your `nix.conf` if you want to use it, or pass
`--extra-experimental-features nix-command` on the command line.
* The old `nix run` has been renamed to `nix shell` (and there is a
new `nix run` that does something else, as described above).
* The `nix` command no longer has a syntax for referring to packages
in a channel. This means that the following no longer works:
> nix build nixpkgs.hello # Nix 2.3
Instead, you can either use the `#` syntax to select a package from
a flake, e.g.
> nix build nixpkgs#hello
Or, if you want to use the `nixpkgs` channel in the `NIX_PATH`
environment variable:
> nix build -f '<nixpkgs>' hello
* The old `nix run` has been renamed to `nix shell`, while there is a
new `nix run` that runs a default command. So instead of
> nix run nixpkgs.hello -c hello # Nix 2.3
you should use
> nix shell nixpkgs#hello -c hello
or just
> nix run nixpkgs#hello
if the command you want to run has the same name as the package.
* It is now an error to modify the `plugin-files` setting via a
command-line flag that appears after the first non-flag argument to