Running mix local.hex fails with “Unknown CA”: > mix local.hex ** (Mix) httpc request failed with: {:failed_connect, [{:to_address, {~c"builds.hex.pm", 443}}, {:inet, [:inet], {:tls_alert, {:unknown_ca, ~c"TLS client: In state wait_cert_cr at ssl_handshake.erl:2138 generated CLIENT ALERT: Fatal - U…

Thanks that put me on the right track! I have now fixed the issue by manually importing the Let’s Encrypt root CA cert from Chain of Trust - Let's Encrypt .

Unknown CA when attempting to perform mix local.hex on Windows

Questions / Help

dogweather November 15, 2023, 8:58am 5

I get these errors as well occasionally with very established domains like the Irish government or universities. I just posted this. I’m switching to curl for http.