sudo apt install opam
opam init
eval `opam config env`
opam switch 4.11.2
eval `opam config env`
sudo apt install m4
Refer to http://www.cduce.org/ to build version 0.7.0-rc10
cd Prototype/src
opam install dune
eval $(opam env)
opam install ppx_deriving menhir pomap
make