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Signed-off-by: Xe Iaso <me@xeiaso.net>
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is_note: true
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lume/src/blog/notes/nix-flakes-terraform-unfree-fix.mdx
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lume/src/blog/notes/nix-flakes-terraform-unfree-fix.mdx
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---
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title: "How to fix terraform and nix flakes"
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date: 2023-10-27
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tags:
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- nix
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- terraform
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- enshittification
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hero:
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ai: Furryrock
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file: coffee-birb
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prompt: A pink haired avali wearing a sweater and sweatpants drinking coffee indoors.
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---
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Recently Terraform [changed licenses](https://www.theregister.com/2023/08/11/hashicorp_bsl_licence/) to the Business Source License. This is a non-free license in the eyes of Nix, so now whenever you update your project flakes, you get greeted by this lovely error:
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```
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error: Package ‘terraform-1.6.2’ in /nix/store/z1nvpjx9vd4151vx2krxzmx2p1a36pf9-source/pkgs/applications/networking/cluster/terraform/default.nix:52 has an unfree license (‘bsl11’), refusing to evaluate.
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a) To temporarily allow unfree packages, you can use an environment variable
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for a single invocation of the nix tools.
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$ export NIXPKGS_ALLOW_UNFREE=1
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Note: For `nix shell`, `nix build`, `nix develop` or any other Nix 2.4+
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(Flake) command, `--impure` must be passed in order to read this
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environment variable.
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b) For `nixos-rebuild` you can set
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{ nixpkgs.config.allowUnfree = true; }
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in configuration.nix to override this.
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Alternatively you can configure a predicate to allow specific packages:
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{
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nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
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"terraform"
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];
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}
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c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
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{ allowUnfree = true; }
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to ~/.config/nixpkgs/config.nix.
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```
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The extra fun part is that when you're using a flake with a per-project version of nixpkgs, none of those workarounds work. Here's what you have to do instead:
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In your flake you'll usually have an import of nixpkgs like this:
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```nix
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let
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pkgs = import nixpkgs { inherit system; };
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in
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crimes_etc
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```
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Or like this:
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```nix
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let
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pkgs = nixpkgs.legacyPackages.${system};
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in
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different_crimes_etc
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```
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You'll want to change that to this:
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```nix
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let
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pkgs = import nixpkgs { inherit system; config.allowUnfree = true; };
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in
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working_crimes_etc
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```
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This allows you to bypass the license check for all packages in nixpkgs so that things Just Work™. If you want to only do this for terraform, you can make a separate instance of nixpkgs to pull out only terraform, but I think that overall it's probably easier to just eliminate the problem entirely.
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I hope this helps you out!
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<XeblogConv name="Cadey" mood="coffee">
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Don't you love the intersection of computers and capitalism? It's the best.
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</XeblogConv>
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<XeblogConv name="Aoi" mood="coffee">
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Tell me about it.
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</XeblogConv>
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