---
tags:
  - nix
---
Root directory contains flake.nix:
Specifies inputs (other flakes) and outputs ([[Nix derivations]]). Allows pinning versions of inputs (dependencies) making it easier to write reproducable expressions.

Avoid multiple nixpkgs by including a follows on the input:
```
inputs = {
  nixpkgs.url = "github:NixOS/nixpkgs/<branch name>";
  hyprland = {
    url = "github:hyprwm/Hyprland";
    inputs.nixpkgs.follows = "nixpkgs";
  };
};
```

Outputs:
[Flake check](https://github.com/NixOS/nix/blob/master/src/nix/flake-check.md)