$ curl -L https://nixos.org/nix/install | sh

$ nix-shell -p scala sbt

$ cat shell.nix
{ pkgs ? import <nixpkgs> {}
}:
pkgs.mkShell {
    buildInputs =
      [ pkgs.sbt
      ];
}
$ nix-shell
$ nix-shell --command "scala"

$ nix-shell --command "sbt clean compile test"

$ cat docker.nix
{ pkgs ? import <nixpkgs> {}
}:
pkgs.dockerTools.buildLayeredImage {
    name = "nix-scala";
    tag = "latest";
    contents =
      [ pkgs.sbt
      ];
}

$ mkdir demo
$ cd demo
$ sbt new gvolpe/sbt-nix.g8