Can't build dylib about curl-rust

[alexcrichton]

This is actually an issue with Cargo because the compiler is both creating libcurl.so and at the same time trying to link to it (as the system also has libcurl.so). Unfortunately there's not much that can be done about this, but when libcurl is built as a dependency and a dylib it should work out just fine.

[lexxvir]

Could you please advise how I can build dependency (from Cargo.toml) as dylib? Any special keyword?
Brief googling have not got answer.

Thank you.