Unfree software

How can I install a proprietary or unfree package?

You won't be able to install or search for an unfree package as a user, unless you explicitly enable it in ~/.config/nixpkgs/config.nix (the file and folder may need to be created):

{
  # [...]
  allowUnfree = true;
}

When using NixOS, it is possible to enable unfree for eg. environment.systemPackages with the following setting in your /etc/nixos/configuration.nix:

{
  # [...]
  nixpkgs.config.allowUnfree = true;
}

Note that this alone will not allow you to search for or install packages with nix-env.

For temporary allowing unfree packages you can set the environment variable NIXPKGS_ALLOW_UNFREE, e.g.

NIXPKGS_ALLOW_UNFREE=1 nix-env

For whitelisting only specific unfree packages or unfree licenses see the "Installing unfree packages" section of the Nixpkgs manual.

Note that we are not able to test or build unfree software on Hydra due to policy. Most unfree licenses prohibit us from either executing or distributing the software.