[Help] WrongArgs error when using the `trans_add_pkg` function.

I'm trying to establish a transaction step by step and I keep getting a `WrongArgs` error when using the `trans_add_pkg` passing a `&Package`. Here's an example: ```rust use alpm::{Alpm, Error, SigLevel, TransFlag}; fn main() -> Result<(), Error> { let alpm = Alpm::new("/", "/var/lib/pacman")?; alpm.register_syncdb("core", SigLevel::USE_DEFAULT)?; alpm.register_syncdb("extra", SigLevel::USE_DEFAULT)?; alpm.trans_init(TransFlag::NO_LOCK)?; let pkg = alpm.localdb().pkg("tevent")?; alpm.trans_add_pkg(pkg)?; let pkgs = alpm.trans_add(); for pkg in pkgs { println!("{}", pkg.name()); } Ok(()) } ``` If, instead of adding a singular package, I call the `sync_sysupgrade`, it works fine and all upgradable packages are successfully added. Am I doing something wrong? A `WrongArgs` in this case really gives me no clue of what it could be. Thanks.