{pkgs ? import "${import <cascade-local/nixpkgs-path.nix>}" {}, ...}: 

with builtins;
with pkgs.lib;
let
  shq = escapeShellArg;
  installSh = fetchurl {
    url = "https://raw.githubusercontent.com/k3s-io/k3s/master/install.sh";
    sha256 = "0f26m5yqwpg8kvwyy2sqsd9kzzyf9jbffplqrsfk4mmwr25r2kvh";
  };
in

pkgs.runCommand "k3s-killall" {
  name = "k3s-killall";
  version = "0f26m5yqwpg8kvwyy2sqsd9kzzyf9jbffplqrsfk4mmwr25r2kvh";
} ''
  set -x
  set -e
  mkdir -p $out/bin
  cat ${shq installSh} | awk '
    /create_killall[(][)] [{]/ {ka=1;}
    ka && /^#!.*sh/ {p=1;}
    ka && once && p && /EOF/ {p=0;once=0;}
    once && p {print;}
    BEGIN { once = 1;}
  ' > $out/bin/k3s-killall
  chmod +x $out/bin/k3s-killall
''