Unable to find package in registry

[vic]

Hi,

I'm getting the following error when doing mix deps.get after creating a fresh mix project and adding a single dependency:

mix deps.get
Running dependency resolution
** (Mix) Unable to find package db_connection in registry

Here's the mix.exs file:

defmodule Foo.Mixfile do
  use Mix.Project

  def project do
    [app: :foo,
     version: "0.1.0",
     elixir: "~> 1.4-rc",
     build_embedded: Mix.env == :prod,
     start_permanent: Mix.env == :prod,
     deps: deps()]
  end

  # Configuration for the OTP application
  #
  # Type "mix help compile.app" for more information
  def application do
    # Specify extra applications you'll use from Erlang/Elixir
    [extra_applications: [:logger]]
  end

  # Dependencies can be Hex packages:
  #
  #   {:my_dep, "~> 0.3.0"}
  #
  # Or git/path repositories:
  #
  #   {:my_dep, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
  #
  # Type "mix help deps" for more examples and options
  defp deps do
    [
      {:postgrex, "~> 1.0.0-rc.1"}
    ]
  end
end

Also happens for other deps like {:dialyxir, "~> 0.4.1"}

** (Mix) Unable to find package dialyxir in registry

even when that is the dependency as reported by mix hex.info dialyxir. Does not happen with others like {:ecto, "~> 2.1"} any idea on what is wrong?

[wojtekmach]

it's probably not gonna solve your issue, but please don't use postgrex 1.0.0-rc.1 - that release got retired (see: https://hex.pm/packages/postgrex/1.0.0-rc.1)

[vic]

Yep, just used postgrex as an example of a much more used package, after actually trying to install dialyxir and other packages like test_async 0.1.2 which I just published yesterday.

The dialyxir version I'm trying to use does not look like being retired:
https://hex.pm/packages/dialyxir/0.4.1

Anyways still don't have a clue on what's wrong.

As a side note, I normally tend to use mix hex.info postgrex to quickly copy and paste the dependency config I need for some package, that's what I did when trying out postgrex, shouldn't hex.info output only the latest non-retired and thus actually-installable version?

[vic]

Possibly some hex service is down :(

$ mix phoenix.new bar
$ cd bar
$ mix deps.get
Running dependency resolution
** (Mix) Unable to find package db_connection in registry

[josevalim]

That may be a cache issue. Try nuking "~/.hex/cache.ets" and see how it goes.

[vic]

Great, that was it, thanks @josevalim ^^ ❤️

[Frost]

Hi,

I'm having this exact issue now, but with the amqp package, which at least [seems to exist](https://hex.pm/packages/amqp/0.1.5:

$ mix deps.get
Failed to fetch record for 'amqp' from registry (using cache)
<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>5FD09CD0ECB5A175</RequestId><HostId>UmKsU/FqwBNS8FwSroNwkSUVS/K0OlMMZBP8QEQMKWuRIV2+rL2D6kHa7UrVJboB3unLWB6mpQo=</HostId></Error>
** (Mix) Unknown package amqp in lockfile

I cannot find any ~/.hex/cache.ets file locally. In fact, I have tried to nuke the entire ~/.hex directory but I still get the same error.

All other packages seem to work fine, so I am not sure if that's an issue with hex or the amqp package.

Minimal reproduction case (creates a new elixir app, adds amqp dependency, and tries to mix deps.get):

bash -c "mix new does_amqp_work && cd does_amqp_work && sed -e 's/\[\]/[{:amqp, \"0.1.5\"}]/' -i mix.exs && mix deps.get"

[Frost]

@twinn narrowed this down to something breaking between hex 0.12 and 0.15: https://twitter.com/tony_winn/status/829814144736051202

Is there any way to downgrade my local version of hex?

[ericmj]

@Frost You seem to have been hit by a separate issue on the backend. I have fixed it manually.

[twinn]

@ericmj @Frost works now, thanks!

[ericmj]

Fixed on the backend: hexpm/hexpm@73760de.

[Frost]

Yep, it works now. Thanks! :)

[cedrico2016]

@josevalim That may be a cache issue. Try nuking "~/.hex/cache.ets" and see how it goes.
How can i nuke "~/.hex/cache.ets"? what is the command for that? I am facing the same issue.

[josevalim]

@cedrico2016 just remove the file. Like rm "~/.hex/cache.ets".