release.nix

let
  foo = self: super: {
    haskell = super.haskell // { packageOverrides =
      hself: hsuper: {
        my-accelerate = hself.callPackage ./pkgs/accelerate { };
      };
    };
  };
in

let
  pkgs  = import pkgs.nixpkgs { overlays = [ foo ]; };
in

  pkgs.haskellPackages.callPackage ./default.nix { accelerate = my-accelerate; }