Unable to install from source due to :enotsup error in the test with `:io.get_password` call.

```bash
$ asdf install elixir ref:main
(…)
1) test I/O protocol with get password (ExUnit.CaptureIOTest)
test/ex_unit/capture_io_test.exs:183
Assertion with == failed
code: assert :io.get_password() == :eof
left: {:error, :enotsup}
right: :eof
stacktrace:
(ex_unit 1.19.0-dev) lib/ex_unit/capture_io.ex:319: ExUnit.CaptureIO.do_capture_gl/2
(ex_unit 1.19.0-dev) lib/ex_unit/capture_io.ex:277: ExUnit.CaptureIO.do_with_io/3
(ex_unit 1.19.0-dev) lib/ex_unit/capture_io.ex:146: ExUnit.CaptureIO.capture_io/1
test/ex_unit/capture_io_test.exs:184: (test)
(…)
```

> I'm unable to reproduce it no matter how much I tried to run those tests **by hand**. In my last try I even used a simple `go` file that calls an `sh` file that calls `make clean test …` in a sub-shell and even this works. I don't know … maybe it's some `asdf` implementation specific issue, but it fails every time I try to call `asdf install elixir ref:main`.

More information in: elixir-lang/elixir#14148

Start with test/ex_unit/capture_io_test.exs:183 and the stack trace through lib/ex_unit/capture_io.ex. Compare the failing `asdf install elixir ref:main` path with running the test by hand, and consult elixir-lang/elixir#14148; done means the named test passes during source installation without `{:error, :enotsup}`.

Written by the indexing model from the issue text.