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{ nixpkgs ? import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {} }:
let
inherit (nixpkgs) pkgs;
inherit (pkgs) haskellPackages;
haskellDeps = ps: with ps; [
base
protolude
containers
];
ghc = haskellPackages.ghcWithPackages haskellDeps;
nixPackages = [
ghc
pkgs.gdb
haskellPackages.cabal-install
];
in
pkgs.stdenv.mkDerivation {
name = "env";
buildInputs = nixPackages;
shellHook = ''
export PS1="\n[hs:\033[1;32m\]\W\[\033[0m\]]> "
'';
}