MarsSeed [1] filed a deletion request for qtweetlib [2]: Broken Qt4 package, EOL since 11 years ago, GitHub repo archived. [a]
Dependency qt4 is needed but is not currently on its dependency chain. [a]: https://github.com/minimoog/QTweetLib [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/qtweetlib/
