Fix 2.4 migration examples
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@ -281,7 +281,9 @@ more than 2800 commits from 195 contributors since release 2.3.
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* The `nix` command is now marked as an experimental feature. This
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means that you need to add
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> experimental-features = nix-command
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```
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experimental-features = nix-command
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```
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to your `nix.conf` if you want to use it, or pass
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`--extra-experimental-features nix-command` on the command line.
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@ -289,30 +291,42 @@ more than 2800 commits from 195 contributors since release 2.3.
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* The `nix` command no longer has a syntax for referring to packages
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in a channel. This means that the following no longer works:
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> nix build nixpkgs.hello # Nix 2.3
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```console
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nix build nixpkgs.hello # Nix 2.3
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```
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Instead, you can either use the `#` syntax to select a package from
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a flake, e.g.
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> nix build nixpkgs#hello
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```console
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nix build nixpkgs#hello
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```
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Or, if you want to use the `nixpkgs` channel in the `NIX_PATH`
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environment variable:
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> nix build -f '<nixpkgs>' hello
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```console
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nix build -f '<nixpkgs>' hello
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```
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* The old `nix run` has been renamed to `nix shell`, while there is a
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new `nix run` that runs a default command. So instead of
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> nix run nixpkgs.hello -c hello # Nix 2.3
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```console
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nix run nixpkgs.hello -c hello # Nix 2.3
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```
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you should use
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> nix shell nixpkgs#hello -c hello
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```console
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nix shell nixpkgs#hello -c hello
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```
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or just
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> nix run nixpkgs#hello
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```console
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nix run nixpkgs#hello
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```
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if the command you want to run has the same name as the package.
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