This guide is aimed for the people who receive from opam the following message:
~ opam install jupyter
> Sorry, no solution found: there seems to be a problem with your request.
No solution found, exiting...I solved the problem, in Fedora, executing this commands (uninstalling OCaml, Opam and the other stuff related to):
# Install dependecies
sudo dnf install m4 curl gitr darcs
# Install Opam from source
sh <(curl -sL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh)
# Install the latest OCaml compiler (the latest version at the moment of writing is the 4.09.0)
opam init -y --compiler=4.09.0
eval $(opam env)
# Then update opam
opam update -uy
# Install base packages
opam install -y async core js_of_ocaml js_of_ocaml-ppx merlin utop ocp-indent
# And finally
opam install jupyter -y
I hope I've been of help.