Developing with nix flakes and nickel

flake.nix

{
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nickel.url = "github:tweag/nickel";
  };
  outputs = { self, nixpkgs, flake-utils, nickel }@inputs:
    flake-utils.lib.eachDefaultSystem (system:
      let pkgs = nixpkgs.legacyPackages.${system};
      in rec {
        devShell =
          pkgs.mkShell { buildInputs = [ nickel.defaultPackage.${system} ]; };
      });
}