enabling crate level logging not working for actix-web

slog_envlogger_actix_web_test.rs

extern crate actix_web;
extern crate slog_envlogger;

use actix_web::actix;
use actix_web::fs::NamedFile;
use actix_web::middleware;
use actix_web::HttpRequest;
use actix_web::Result;
use actix_web::{server, App};

pub fn path(_req: &HttpRequest) -> Result<NamedFile> {
    Ok(NamedFile::open("index.html")?)
}

fn main() -> std::result::Result<(), Box<std::error::Error>> {
    std::env::set_var("RUST_LOG", "info"); // works
    //std::env::set_var("RUST_LOG", "actix_web=info"); //doesn't work

    let _guard = slog_envlogger::init()?;

    let sys = actix::System::new("test");
    let addr = "0.0.0.0:3276";

    server::new(|| {
        App::new()
            .middleware(middleware::Logger::default())
            .resource("/", |r| r.f(path))
    }).bind(addr)
        .expect(&format!("could not bind to {}", addr))
        .start();

    let _ = sys.run();

    Ok(())
}

should log

Sep 06 06:36:07.536 INFO Starting 16 http workers
Sep 06 06:36:07.545 INFO Starting server on http://0.0.0.0:3276

in either case.