Hide dune.2.9.0 as much as possible (generates broken dune files)
Hide dune.2.9.0 as much as possible (generates broken dune files)

We can't remove it (as it would break lock files) but we can "hide" it for opam >= 2.1 users. It will still be available but will only be taken on the very last resort.
codinuum/opam-repository,astrada/opam-repository,ocaml/opam-repository,c-cube/opam-repository,pirbo/opam-repository,Leonidas-from-XIV/opam-repository,emillon/opam-repository,lefessan/opam-repository,c-cube/opam-repository,lefessan/opam-repository,Leonidas-from-XIV/opam-repository,hannesm/opam-repository,djs55/opam-repository,jhwoodyatt/opam-repository,nberth/opam-repository,jonludlam/opam-repository,mjambon/opam-repository,andersfugmann/opam-repository,toots/opam-repository,toots/opam-repository,nberth/opam-repository,jhwoodyatt/opam-repository,fpottier/opam-repository,kkirstein/opam-repository,pqwy/opam-repository,andersfugmann/opam-repository,Chris00/opam-repository,hannesm/opam-repository,ocaml/opam-repository,yallop/opam-repository,pqwy/opam-repository,mjambon/opam-repository,fpottier/opam-repository,kkirstein/opam-repository,jonludlam/opam-repository,djs55/opam-repository,pirbo/opam-repository,emillon/opam-repository,codinuum/opam-repository,yallop/opam-repository,astrada/opam-repository,Chris00/opam-repository