Path to the environment file sourced on startup. It must at least contain the variables SLSKD_SLSK_USERNAME and SLSKD_SLSK_PASSWORD. Web interface credentials should also be set here in SLSKD_USERNAME and SLSKD_PASSWORD. Other, optional credentials like SOCKS5 with SLSKD_SLSK_PROXY_USERNAME and SLSKD_SLSK_PROXY_PASSWORD should all reside here instead of in the world-readable nix store. Variables are documented at https://github.com/slskd/slskd/blob/master/docs/config.md.
option