Installer assumes no TTY when a TTY is present

[winterqt]

Describe the bug

When running the installer with curl -L https://nixos.org/nix/install | sh -s -- --darwin-use-unencrypted-nix-store-volume --daemon as recommended in the manual, the script assumes that no TTY is present.

Steps To Reproduce

1. Run curl -L https://nixos.org/nix/install | sh -s -- --darwin-use-unencrypted-nix-store-volume --daemon

Expected behavior

For the script to detect a TTY successfully

nix-env --version output

n/a

Additional context

I am using the iTerm terminal emulator on macOS. I am unsure if this is relevant, but I would not be surprised.

[abathur]

AFAIK this is expected behavior with the pipe syntax while sh <(curl...) would do what you expect?

[winterqt]

while sh <(curl...) would do what you expect?

This doesn't work on Fish, sadly.

[stale]

I marked this as stale due to inactivity. → More info