nick.nix

self: super:

{
  # Install overlay:
  # $ mkdir -p ~/.config/nixpkgs/overlays
  # $ curl https://gist.githubusercontent.com/LnL7/570349866bb69467d0caf5cb175faa74/raw/3f3d53fe8e8713ee321ee894ecf76edbcb0b3711/lnl-overlay.nix -o ~/.config/nixpkgs/overlays/lnl.nix
  userPackages = super.userPackages or {} // {
    self.config.allowUnfree = true;

    # core
    cacert = self.cacert;
    nix = self.nix;

    # terminal
    ag = self.ag;
    bat = self.bat;
    ctags = self.ctags;
    fzf = self.fzf;
    git = self.git;
    jq = self.jq;
    httpie = self.httpie;
    neovim = self.neovim;
    tig = self.tig;
    tmux = self.tmux;
    tree = self.tree;
    watch = self.watch;
    zsh = self.zsh;

    # databases
    postgresql = self.postgresql;

    # docker
    docker = self.docker;
    docker_machine = self.docker-machine;
    docker_compose = self.docker_compose;

    # programming lanugages
    node = self.nodejs-10_x;
    shellcheck = self.shellcheck;

    # web development
    chromedriver = self.chromedriver;

    # devops
    terraform = self.terraform;
    aws = self.awscli;
    python3 = self.python3;
    pip = self.python37Packages.pip;
    # TODO - aws-mfa

    # nix tooling
    pypi2nix = self.pypi2nix;

    nix-rebuild = super.writeScriptBin "nix-rebuild" ''
      #!${super.stdenv.shell}
      if ! command -v nix-env &>/dev/null; then
          echo "warning: nix-env was not found in PATH, add nix to userPackages" >&2
          PATH=${self.nix}/bin:$PATH
      fi
      exec nix-env -f '<nixpkgs>' -r -iA userPackages "$@"
    '';

  };
}

output

❯ nix-shell ./nix/wabt.nix --run "bash" --verbose
evaluating file '/nix/store/agq9zq79m9yys2yli2vr0c999rfrg13h-nix-2.1.3/share/nix/corepkgs/derivation.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/default.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/minver.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/top-level/impure.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/top-level/default.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/stdenv/booter.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/default.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/fixed-points.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/lists.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/stdenv/default.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/systems/default.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/attrsets.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/systems/inspect.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/trivial.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/systems/parse.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/strings.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/types.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/options.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/systems/platforms.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/stdenv/darwin/default.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/top-level/stage.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/stdenv/adapters.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/build-support/trivial-builders.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/top-level/splice.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/top-level/all-packages.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/top-level/aliases.nix'
evaluating file '/Users/nickjohnstone/.config/nixpkgs/overlays/nick.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/pkgs/stdenv/generic/default.nix'
evaluating file '/nix/store/xcbrp98b95bdwqbd68kxcsagrdl8pq84-nixpkgs-19.03pre165281.7d864c6bd63/nixpkgs/lib/customisation.nix'
error: i686 Linux package set can only be used with the x86 family.

wabt.nix

{ pkgs ? import <nixpkgs> {} }:

with pkgs;

self.stdenv.mkDerivation {
  name = "wabt";
  src = fetchFromGitHub {
    owner = "WebAssembly";
    repo = "wabt";
    rev = "71ce746f1be4290b8d20449ff35b852b5cc374d2";
    sha256 = "0szkr01vdigs3h68qnfzhcl385394b4cfbdd14s3hkk7jm61z0a2";
  };
  nativeBuildInputs = [ cmake python ];
  enableParallelBuilding = true;
  cmakeFlags = ["-DBUILD_TESTS=OFF"];
}