Flakes: Difference between revisions
imported>Asymmetric m →Non-NixOS: fix snippet to nixFlakes |
imported>Wackbyte m fix syntax highlighting error + missing syntax highlighting |
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Edit either <code>~/.config/nix/nix.conf</code> or <code>/etc/nix/nix.conf</code> and add: | Edit either <code>~/.config/nix/nix.conf</code> or <code>/etc/nix/nix.conf</code> and add: | ||
<syntaxHighlight> | <syntaxHighlight lang=text> | ||
experimental-features = nix-command flakes | experimental-features = nix-command flakes | ||
</syntaxHighlight> | </syntaxHighlight> | ||
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With this in place, you can now replace the use nix invocation in the <code>.envrc</code> file with <code>use flake</code>: | With this in place, you can now replace the use nix invocation in the <code>.envrc</code> file with <code>use flake</code>: | ||
<syntaxHighlight> | <syntaxHighlight lang=text> | ||
# .envrc | # .envrc | ||
use flake | use flake | ||
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in nixpkgs.overlays = [ overlay-unstable ]; # we assign the overlay created before to the overlays of nixpkgs. | in nixpkgs.overlays = [ overlay-unstable ]; # we assign the overlay created before to the overlays of nixpkgs. | ||
</syntaxHighlight> | </syntaxHighlight> | ||
should make a package accessible through < | should make a package accessible through <code>pkgs.unstable.package</code> | ||
For example, a NixOS config flake skeleton could be as follows: | For example, a NixOS config flake skeleton could be as follows: | ||
<syntaxHighlight lang=nix> | <syntaxHighlight lang=nix> | ||
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} | } | ||
</syntaxHighlight> | </syntaxHighlight> | ||
Same can be done with the NURs, as it already has an ''overlay'' attribute in the flake.nix of the project, you can just add <syntaxHighlight>nixpkgs.overlays = [ nur.overlay ];</syntaxHighlight> | Same can be done with the NURs, as it already has an ''overlay'' attribute in the flake.nix of the project, you can just add <syntaxHighlight lang=nix>nixpkgs.overlays = [ nur.overlay ];</syntaxHighlight> | ||
If the variable <code>nixpkgs</code> points to the flake, you can also define <code>pkgs</code> with overlays with: | If the variable <code>nixpkgs</code> points to the flake, you can also define <code>pkgs</code> with overlays with: | ||
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How to get a nix repl out of your system flake: | How to get a nix repl out of your system flake: | ||
<syntaxHighlight> | <syntaxHighlight lang=text> | ||
# nix repl | # nix repl | ||
>> :lf /etc/nixos | >> :lf /etc/nixos | ||
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Or out of your current flake: | Or out of your current flake: | ||
<syntaxHighlight> | <syntaxHighlight lang=text> | ||
# nix repl | # nix repl | ||
>> :lf .# | >> :lf .# | ||
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However, this won't be instant upon evaluation if any file changes have been done since your last configuration rebuild. Instead, if one puts: | However, this won't be instant upon evaluation if any file changes have been done since your last configuration rebuild. Instead, if one puts: | ||
<syntaxHighlight>nix.nixPath = let path = toString ./.; in [ "repl=${path}/repl.nix" "nixpkgs=${inputs.nixpkgs}" ];</syntaxHighlight> | <syntaxHighlight lang=nix> | ||
nix.nixPath = let path = toString ./.; in [ "repl=${path}/repl.nix" "nixpkgs=${inputs.nixpkgs}" ]; | |||
</syntaxHighlight> | |||
In their system <code>flake.nix</code> configuration file, and includes the following file in their root directory flake as <code>repl.nix</code>: | In their system <code>flake.nix</code> configuration file, and includes the following file in their root directory flake as <code>repl.nix</code>: | ||
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Then one can run (or bind a shell alias): | Then one can run (or bind a shell alias): | ||
<syntaxHighlight> | <syntaxHighlight lang=bash> | ||
source /etc/set-environment && nix repl $(echo $NIX_PATH | perl -pe 's|.*(/nix/store/.*-source/repl.nix).*|\1|')</syntaxHighlight> | source /etc/set-environment && nix repl $(echo $NIX_PATH | perl -pe 's|.*(/nix/store/.*-source/repl.nix).*|\1|')</syntaxHighlight> | ||
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To use nonfree software in a flake, add <code>nixpkgs</code> as an input in your flake and import it with the <code>allowUnfree</code> option: | To use nonfree software in a flake, add <code>nixpkgs</code> as an input in your flake and import it with the <code>allowUnfree</code> option: | ||
<syntaxHighlight> | <syntaxHighlight lang=nix> | ||
pkgs = import nixpkgs { config = { allowUnfree = true; }; } | pkgs = import nixpkgs { config = { allowUnfree = true; }; }; | ||
</syntaxHighlight> | </syntaxHighlight> | ||
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If you want to install software using home-manager via nix flakes in non NixOS systems (like darwin) you can use the home-manager <code>nixpkgs.config</code> option for example | If you want to install software using home-manager via nix flakes in non NixOS systems (like darwin) you can use the home-manager <code>nixpkgs.config</code> option for example | ||
< | <syntaxHighlight lang=nix> | ||
nixpkgs.config.allowUnfree = true; | |||
</syntaxHighlight> | |||
== Official Nix links == | == Official Nix links == | ||