This expression has type string but an expression was expected of type bytes

[nomeata]

I was trying to build your tool, but it failed:

File "main.ml", line 16, characters 26-29:
Error: This expression has type string but an expression was expected of type
         bytes
Command exited with code 2.
Compilation unsuccessful after building 14 targets (0 cached) in 00:00:00.

[nomeata]

This is ocamlc version 4.06.0

[kyonofx]

This is ocamlc version 4.06.0

I managed to run the code with ocamlc version 4.02.1

[martinberger]

@nomeata @kyonofx The pull request #3 fixes this, in parts by moving do Dune. Please merge in.