===> Building for emacs-viewer-0.0nb20221206
cd /scratch/wip/emacs-viewer-git/work/emacs-viewer && dune build --release ./bin/main.exe
File "dune-project", line 1, characters 11-14:
1 | (lang dune 3.4)
               ^^^
Error: Version 3.4 of the dune language is not supported.
Supported versions of this extension in version 3.4 of the dune language:
- 1.0 to 1.12
- 2.0 to 2.9
