readme: expand preconditions installation step
Also fix markdown list item numbering.
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README.md
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README.md
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@ -46,6 +46,14 @@ Currently the easiest way to install Home Manager is as follows:
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since Home Manager uses these directories to manage your profile
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since Home Manager uses these directories to manage your profile
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generations. On NixOS these should already be available.
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generations. On NixOS these should already be available.
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Also make sure that your user is able to build and install Nix
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packages. For example, you should be able to successfully run a
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command like `nix-instantiate '<nixpkgs>' -A hello`. For a
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multi-user install of Nix this means that your user must be
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covered by the [`allowed-users`][nixAllowedUsers] Nix option. On
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NixOS you can control this option using the
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[`nix.allowedUsers`][nixosAllowedUsers] system option.
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2. Assign a temporary variable holding the URL to the appropriate
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2. Assign a temporary variable holding the URL to the appropriate
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archive. Typically this is
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archive. Typically this is
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@ -61,7 +69,7 @@ Currently the easiest way to install Home Manager is as follows:
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depending on whether you follow Nixpkgs unstable or version 17.09.
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depending on whether you follow Nixpkgs unstable or version 17.09.
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2. Create an initial Home Manager configuration file:
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3. Create an initial Home Manager configuration file:
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```console
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```console
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$ cat > ~/.config/nixpkgs/home.nix <<EOF
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$ cat > ~/.config/nixpkgs/home.nix <<EOF
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@ -72,7 +80,7 @@ Currently the easiest way to install Home Manager is as follows:
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EOF
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EOF
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```
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```
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3. Create the first Home Manager generation:
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4. Create the first Home Manager generation:
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```console
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```console
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$ nix-shell $HM_PATH -A install --run 'home-manager switch'
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$ nix-shell $HM_PATH -A install --run 'home-manager switch'
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@ -235,3 +243,5 @@ in your Home Manager configuration.
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[Nix]: https://nixos.org/nix/
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[Nix]: https://nixos.org/nix/
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[NixOS]: https://nixos.org/
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[NixOS]: https://nixos.org/
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[Nixpkgs]: https://nixos.org/nixpkgs/
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[Nixpkgs]: https://nixos.org/nixpkgs/
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[nixAllowedUsers]: https://nixos.org/nix/manual/#conf-allowed-users
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[nixosAllowedUsers]: https://nixos.org/nixos/manual/options.html#opt-nix.allowedUsers
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