{
  pkgs ? import <nixpkgs> { },
}:

# let
#   unstable =
#     import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixpkgs-unstable.tar.gz")
#       { };
# in
pkgs.mkShell {
  name = "Glyph IDE";

  buildInputs = [
    # System
    pkgs.helix
    pkgs.bash
    pkgs.toybox
    pkgs.git
    pkgs.lazygit
    pkgs.tree

    # Build tools
    pkgs.just
    pkgs.watchexec
    pkgs.amber-lang

    # Haskell
    pkgs.haskell.compiler.ghc912
    pkgs.cabal-install
    pkgs.hlint
    pkgs.stylish-haskell
    pkgs.haskellPackages.fourmolu
    pkgs.haskellPackages.cabal-fmt
    pkgs.haskellPackages.hoogle

    # C libraries the Haskell dependency tree links against.
    # zlib: pulled in by dhall (via the `zlib` package, for its binary cache).
    pkgs.zlib
    pkgs.pkg-config

    # Dhall
    pkgs.dhall

    # Markdown
    pkgs.prettier

    # Nix
    pkgs.nixfmt
  ];

  GLYPH_GHC_DOCS = "${pkgs.haskell.compiler.ghc912.doc}/share/doc/ghc/html/libraries";
}