Building software that requires older libressl on snapshots

[Patrick Marchand]

So I'm trying to build pijul (rust vcs based on patch theory) but it
requires rust-openssl, which only supports the latest release of
libressl (2.6). Is there a quick fix to build software that requires an
older libressl than what is currently used in snapshots? Or should I try
to patch the rust-openssl source code myself.