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| Hydra does not test or build unfree software by policy. Most unfree licenses have restrictions on software distribution.
| | Unfree software refers to software that has restrictive licensing on modification and/or redistribution. This type of software cannot be freely provided or distributed in an official capacity, which means that unfree software is neither built by [[Hydra]], nor cached on the official [[Binary Cache|binary cache]]. Despite this, Nixpkgs offers a very large collection of unfree software as derivations, however they cannot be used by default without configuring Nixpkgs and opting in to unfree software usage. |
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| === Per-package (Ideal) ===
| | [https://nixos.org/manual/nixpkgs/stable/#sec-allow-unfree Nixpkgs manual on allowing unfree packages] |
| This method works for both NixOS system level configuration and [[Home manager]]:
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| {{file|/etc/nixos/configuration.nix|nix|<nowiki>
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| {
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| nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
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| "vscode"
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| ];
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| }
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| </nowiki>}}
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| === For all packages ===
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| This method works for both NixOS system level configuration and [[Home manager]]:
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| {{file|/etc/nixos/configuration.nix|nix|<nowiki>
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| {
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| nixpkgs.config.allowUnfree = true;
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| }
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| </nowiki>}}
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| === Command Line ===
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| You won't be able to install or search for an unfree package as a user unless you explicitly enable it:
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| {{file|~/.config/nixpkgs/config.nix|nix|<nowiki>
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| {
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| allowUnfree = true;
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| }
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| </nowiki>}}
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| === Temporary allowing ===
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| For temporary allowing unfree packages, you can use an environment variable:
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| <syntaxhighlight lang="bash">
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| $ NIXPKGS_ALLOW_UNFREE=1 nix-shell -p vscode
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| </syntaxhighlight>
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| Note for the new nix3-style commands, you need to pass <code>--impure</code> as well:
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| <syntaxhighlight lang="bash">
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| $ NIXPKGS_ALLOW_UNFREE=1 nix run nixpkgs#vscode --impure
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| </syntaxhighlight>
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| === See also ===
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| * [https://nixos.org/nixpkgs/manual/#sec-allow-unfree Nixpkgs manual#Installing unfree packages]
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| [[Category:Software]] | | [[Category:Software]] |
| | [[Category:Nixpkgs]] |