webidl.o not found in opam installation

[tari3x]

I wrote an example app using webidl, and I am now trying to compile it using dune. My dune file looks like this:

(executables
 (names main)
 (libraries core async webidl ppx_deriving.runtime)
 (preprocess
  (pps ppx_jane ppx_deriving)))

I then sadly get the error:

gcc: error: /home/avatar/.opam/4.09.0/lib/webidl/webidl.o: No such file or directory

Which is correct, that file isn't there. The directory only contains

./META
./webidl.cmx
./webidl.cmt
./webidl.cmi
./webidl.cmo

Am I trying to use this incorrectly?

[tari3x]

Indeed, once I manually compiled webidl and copied the .o file over to the opam directory, everything worked fine.