crates/sharded-slab/flake.nix

# in flake.nix
{
  description =
    "Flake containing a development shell for the `sharded-slab` crate";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs = {
        nixpkgs.follows = "nixpkgs";
        flake-utils.follows = "flake-utils";
      };
    };
  };

  outputs = { self, nixpkgs, flake-utils, rust-overlay }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        overlays = [ (import rust-overlay) ];
        pkgs = import nixpkgs { inherit system overlays; };
        rustToolchain = pkgs.pkgsBuildHost.rust-bin.stable.latest.default;
        nativeBuildInputs = with pkgs; [ rustToolchain pkg-config ];
      in with pkgs; {
        devShells.default = mkShell { inherit nativeBuildInputs; };
      });
}