Dune build fails and takes ages to install about flitter HOT 4 CLOSED

Error: This expression has type (unit -> unit) Lwt.t
       but an expression was expected of type unit Lwt.t
       Hint: Did you forget to provide `()' as argument?
Done: 216/230 (jobs: 1)^J

[christophersmith@this-is-pc flitter]$ dune build
File "_none_", line 1: 
Warning 58: no cmx file was found in path for module Toploop, and its interface was not compiled with -opaque
File "vendor/notty/lwt/notty_lwt.ml", line 68, characters 25-64:
Error: This expression has type (unit -> unit) Lwt.t
       but an expression was expected of type unit Lwt.t
       Hint: Did you forget to provide `()' as argument?
Done: 212/230 (jobs: 1)[christophersmith@this-is-pc flitter]$ dune build
File "vendor/notty/lwt/notty_lwt.ml", line 68, characters 25-64:
Error: This expression has type (unit -> unit) Lwt.t
       but an expression was expected of type unit Lwt.t
       Hint: Did you forget to provide `()' as argument?
[christophersmith@this-is-pc flitter]$