{ doCheck ? true }:
mkShell {
  buildInputs = [
  ];
  shellHook = ''
    export HYDRA_HOME="src/"
    mkdir -p .hydra-data
    export HYDRA_DATA="$(pwd)/.hydra-data"
    exec foreman start
  '';
}
    export HYDRA_DBI='dbi:Pg:dbname=hydra;host=localhost;port=64444'
    foreman (hydra.overrideAttrs (_: { inherit doCheck; })) postgresql95
{ foreman, mkShell, hydra, postgresql95 }:

hydra-server: ./scripts/start-hydra.sh
hydra-queue-runner: ./scripts/start-queue-runner.sh
hydra-evaluator: ./scripts/start-evaluator.sh
postgres: ./scripts/start-postgres.sh

hydra-server: ./foreman/start-hydra.sh
hydra-queue-runner: ./foreman/start-queue-runner.sh
hydra-evaluator: ./foreman/start-evaluator.sh
postgres: ./foreman/start-postgres.sh

              postgresql95

            postgresql95

            foreman

            export HYDRA_HOME="src/"
            mkdir -p .hydra-data
            export HYDRA_DATA="$(pwd)/.hydra-data"
            export HYDRA_DBI='dbi:Pg:dbname=hydra;host=localhost;port=64444'

      runHydra = pkgs.callPackage ./run-hydra.nix {};
      devShell = pkgs.hydra.overrideAttrs (old: {
        buildInputs = old.buildInputs ++ [ pkgs.foreman ];
        shellHook = old.shellHook + ''
          export HYDRA_HOME="src/"
          mkdir -p .hydra-data
          export HYDRA_DATA="$(pwd)/.hydra-data"
          export HYDRA_DBI='dbi:Pg:dbname=hydra;host=localhost;port=64444'
        '';
      });

}).defaultNix.devShell

}).shellNix