cabal new-configure
cabal new-build

stack new my-project
cd my-project
stack setup
stack build
stack exec my-project-exe

curl https://nixos.org/nix/install | sh
nix-env -i cabal2nix
nix-env -i nix-prefetch-git
nix-env -i cabal-install
cabal update
cabal install cabal-install
cabal2nix . > default.nix
cat << EOF > build.nix
let
  pkgs = import <nixpkgs> { };

in
  pkgs.haskellPackages.callPackage ./default.nix { }
EOF

nix-build build.nix