=> Bootstrap dependency digest>=20010302: found digest-20190127
===> Building for ocaml-optint-0.0.2
File "src/int_x64_backend.ml", line 14, characters 12-26:
14 | let abs x = Pervasives.abs x
                 ^^^^^^^^^^^^^^
Alert deprecated: module Stdlib.Pervasives
Use Stdlib instead.

If you need to stay compatible with OCaml < 4.07, you can use the 
stdlib-shims library: https://github.com/ocaml/stdlib-shims
File "src/int_x64_backend.ml", line 20, characters 28-38:
20 | let lognot x = lnot (x land 0xffffffff)
                                 ^^^^^^^^^^
Error: Integer literal exceeds the range of representable integers of type int
*** Error code 1

Stop.
make[1]: stopped in /usr/pkgsrc/devel/ocaml-optint
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/devel/ocaml-optint