notes/Projects/Infrastructure/Nix commands (Flakes).md

## Table of contents

- [`nix build`](##`nix build`)

### `nix build`

Command to build nix packages, either locally sourced or from third parties (like nixpkgs)

### Example

#### Local

Set something to build inside your Nix flake (`flake.nix`) then run `nix build`.

Here's an example you can put in Nix flake:

```nix
 packages.default = pkgs.rustPlatform.buildRustPackage {
  name = "zero-to-nix-rust";
  src = ./.;
  cargoLock = {
    lockFile = ./Cargo.lock;
  };
};
```

Then run:

`nix build`

to build your home brewed package!
#### Third party/Remote

You can either grab something from GitHub (using the `github:user/repo*#optional_pkg`) or a URL (using the `https://scm.wyattjmiller.com/wymiller/cool-repo*#pkg`).

Example from GitHub:

```bash
nix build "github:"
```

Example from a URL:

```bash
nix build "https://flakehub.com/f/NixOS/nixpkgs/*#bat"
```