NixOS/flake-compat

---

NixOS/flake-compat.json

{
  "createdAt": "2020-02-25T13:15:05Z",
  "defaultBranch": "master",
  "description": null,
  "fullName": "NixOS/flake-compat",
  "homepage": null,
  "language": "Nix",
  "name": "flake-compat",
  "pushedAt": "2025-12-02T21:50:49Z",
  "stargazersCount": 312,
  "topics": [],
  "updatedAt": "2025-12-02T21:50:54Z",
  "url": "https://github.com/NixOS/flake-compat"
}

flake-compat

Usage

To use, add the following to your flake.nix:

inputs.flake-compat = {
  url = "github:NixOS/flake-compat";
  flake = false;
};

Afterwards, create a default.nix file containing the following:

(import
  (
    let
      lock = builtins.fromJSON (builtins.readFile ./flake.lock);
      nodeName = lock.nodes.root.inputs.flake-compat;
    in
    fetchTarball {
      url = lock.nodes.${nodeName}.locked.url or "https://github.com/NixOS/flake-compat/archive/${lock.nodes.${nodeName}.locked.rev}.tar.gz";
      sha256 = lock.nodes.${nodeName}.locked.narHash;
    }
  )
  { src = ./.; }
).defaultNix

If you would like a shell.nix file, create one containing the above, replacing defaultNix with shellNix.

You can access any flake output via the outputs attribute returned by flake-compat, e.g.

(import ... { src = ./.; }).outputs.packages.x86_64-linux.default