AppImage packaging failed when copying shared libraries

[tk-nguyen]

Hello! We're using this package to create Linux AppImage builds for our app, but it is failing when copying over shared libraries. Probably it's because it's copying twice.

After running ldd on the built app, there are 2 locations for our shared libraries, which cause flutter_distributor to copy them both:

Maybe we can add -f to cp command or detect duplicated shared libraries?