Fails to detect true color on Alacritty over SSH

Summary

Fails to detect true color support when SSHing into a host. Variables related to terminto seem correct. Have reproduced on NixOS and CachyOS servers, nix-darwin client. Happy to help debug.

Reproduction Steps

I tried this:

1. hx

I expected this to happen:

My theme to load, e.g everforest_dark

Instead, this happened:

Doesn't load the theme.

Helix log

~/.cache/helix/helix.log

2026-06-23T22:49:08.963 helix_term::application [WARN] loaded theme `everforest_dark` but cannot use it because true color support is not enabled

Platform

Linux

Terminal Emulator

alacritty 0.17.0

Installation Method

nixpkgs, cachyos repo

Helix Version

helix 25.07.1