Getting this error trying to get set up with the new Ash book:

$ mix igniter.install ash_postgres
checking for igniter in project ✔
compiling igniter ✔
setting up igniter ✔
** (UndefinedFunctionError) function :http_util.timestamp/0 is undefined (module :http_util is not available)
    (inets 9.3) :http_util.timestamp()
    (inets 9.3) httpc.erl:1151: :httpc.handle_request/9
    (igniter 0.5.8) lib/igniter/project/deps.ex:276: Igniter.Project.Deps.determine_dep_type_and_version/1
    (igniter 0.5.8) lib/igniter/util/install.ex:29: anonymous fn/1 in Igniter.Util.Install.install/4
    (elixir 1.18.1) lib/enum.ex:1714: Enum."-map/2-lists^map/1-1-"/2
    (igniter 0.5.8) lib/igniter/util/install.ex:28: Igniter.Util.Install.install/4
    (mix 1.18.1) lib/mix/task.ex:495: anonymous fn/3 in Mix.Task.run_task/5
    (mix 1.18.1) lib/mix/cli.ex:107: Mix.CLI.run_task/2

Looks like a commit from two days ago might be the culprit.

Editing deps in mix.exs to {:igniter, "~> 0.5.15"} seems to have fixed the error.