Unbound value error when running "dune build"

[cassidoxa]

When I try to run dune build I get the following error:

File "src/colors.ml", line 5, characters 8-26:
Error: Unbound value Color.of_hexstring
Hint: Did you mean to_hexstring?

I tried following the hint and got a type error.

[alexozer]

Thanks for reporting!

I cannot reproduce. Just to make sure, you've set up opam like this?

$ opam init
$ opam switch 4.07.0
$ opam install dune core lwt re color sexp_pretty

During opam init, did you let it add the opam config hook to your shell init? Like this in your .bashrc or .zshrc:

# OPAM configuration
. /home/alex/.opam/opam-init/init.zsh > /dev/null 2> /dev/null || true

You might need to reload your terminal

[alexozer]

The reason I ask is because I suspect an old version of the Color library is being pulled in without this commit: anuragsoni/color@3449ab9#diff-3b911a16cb75f078b7c3ccd2682c5e09

So if you aren't on OCaml 4.07.0 that might explain why.

[cassidoxa]

Thanks for the help. Your suspicions were correct. I'm running debian 9 stable which was using an old version of opam that pulled in an old version of color. Updating to color 0.2.0 fixed the issue