# read the current directorys files and pipe the result through a list of functions
builtins.foldl' (x: f: f x) (builtins.readDir ./.) [
  # convert to a list containing just the attribute names
  (builtins.attrNames)
  # drop "default.nix" from the list
  (builtins.filter (name: name != "default.nix"))
  # map the list to a name-value pair with a name that has the last  4 chars (".nix") stripped, and a value that is the contents of that given file
  (builtins.map (name: {
    inherit name;
    value = import ./${name};
  }))
  # convert the resulting list to an attribute set
  (builtins.listToAttrs)
]