dune-universe/mirage-opam-overlays is an opam repository containing all
package definitions of cross compilation ports of existing packages from the
main default repository that cannot be cross compiled.
It's meant to be used by the opam-monorepo
tool to allow you to vendor your dependencies and cross compiler your entire project
using dune only.
All packages' versions in this repository are suffixed with a +mirage to
distinguish them from the upstream variants. That means that the
opam-overlays port of package abc version X.Y.Z is available on this repo
as abc version X.Y.Z+mirage.
Note that if a cross compilation port is based on a dune port from
dune-universe/opam-overlays, for instance on the dune port of abc.X.Y.Z,
versioned abc.X.Y.Z+dune, the cross compilation port should be versioned
abc.X.Y.Z+dune+mirage.