Updates from review comments

Author: tmcgilchrist

bin/main.ml

@@ -30,7 +30,8 @@ let reporter =
 let setup_log style_renderer level =
   Fmt_tty.setup_std_outputs ?style_renderer ();
   Logs.set_level level;
-  (* Disable tls.tracing when logs are set to debug *)
+  (* Disable tls.tracing when logs are set to debug:
+     (remove once we have https://github.com/dbuenzli/logs/issues/37) *)
   (* List.iter
      (fun src -> match Logs.Src.name src with "tls.tracing" -> Logs.Src.set_level src (Some Info) | _ -> ())
      @@ Logs.Src.list (); *)

worker/solver_worker.ml

@@ -61,7 +61,7 @@ let build ~cancelled ~log t descr =
     let output = Custom.solve ~cancelled ~solver:t.solver ~log c in
     Log_data.write log "Job succeeded\n";
     (Ok output, "ok")
-  | _ ->
+  | Obuilder_build _ | Docker_build _ ->
     let msg = "Only custom builds are supported" in
     (Error (`Msg msg), "build failed")