Hardcaml can be installed with opam I recommend the following packages to get started This will install the core Hardcaml library a waveform viewer which is helpful for building tests and the hardcaml ppx To access the latest packages or the most up to date version you may want to try the Jane Street bleeding edge opam repository opam install hardcaml hardcaml_waveterm ppx_hardcaml opam repo add janestreet bleeding https github com janestreet opam repository git