can't find how to set the proxy

[erkekin]

$ elan default stable

returns

info: syncing channel updates for 'stable'
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { description: "Failure when receiving data from the peer", code: 56, extra: Some("Received HTTP code 407 from proxy after CONNECT") }', src/elan-utils/src/utils.rs:519:32
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

just like ruby's gem has --http-proxy, elan should have a way to pass the proxy