Getting type errors when building

[differentprogramming]

I'm guessing that we're in dependency hell and some included library has changed too much.

errors:

joshuascholar@DESKTOP-Q4CLN3U:~/bolt$ make build
make pre-build
make[1]: Entering directory '/home/joshuascholar/bolt'
make[1]: Leaving directory '/home/joshuascholar/bolt'
dune build
File "src/frontend/typing/pprint_tast.ml", line 97, characters 5-15:
97 | if block_name = "" then List.iter ~f:(pprint_expr ppf ~indent) exprs
^^^^^^^^^^
Error: This expression has type string but an expression was expected of type
int
File "src/frontend/typing/type_env.mli", line 57, characters 37-46:
57 | type_expr -> Parsed_ast.class_defn sexp_list -> string -> unit Or_error.t
^^^^^^^^^
Error (alert deprecated): Core.sexp_list
[since 2019-03] use [@sexp.list] instead
File "src/frontend/typing/type_overloading.mli", line 29, characters 16-25:
29 | -> (type_expr sexp_list * type_expr) Or_error.t
^^^^^^^^^
Error (alert deprecated): Core.sexp_list
[since 2019-03] use [@sexp.list] instead
File "tests/frontend/alcotest/parsing/test_lexer.ml", line 8, characters 56-62:
8 | Alcotest.testable pprint_tokens (fun token1 token2 -> token1 = token2)
^^^^^^
Error: This expression has type token but an expression was expected of type
int
make: *** [Makefile:9: build] Error 1

Two of those errors are easy to fix by replacing sexp_list with [@sexp.list] as it says but I have no idea what to do with the type errors.