When having a message like `waiting for a machine to build X` and building with `nix build -L`, the log-prefix is always colored yellow[1] on a small terminal-width as everything (including the ANSI color-reset) is stripped away. To work around that problem, this patch explicitly adds an `ANSI_NORMAL` to the end of the line. [1] https://imgur.com/a/FjtJOk3