Adding Qt6 plugin to runtime?

May 28, 2025 Closed
L
#1

Hello,

I would like to use SQLcipher in my Qt6 Flatpak.

I usually compile the QtSQLcipher plugin from https://github.com/chehrlic/QtSQLcipher-Qt6 and install it in the /plugins/sqldrivers directory.

However, this directory is read-only in the runtime environment under /usr/lib.

How does this work in a Flatpak and how can I add this library?

Thank you very much!

B
#2

Install it to /app prefix as part of your app manifest.

L
#3

I forgot to mention that I’ve already tried this with the /app/lib directory.

After the plugin is loaded, nothing happens (I ran it with QT_DEBUG_PLUGINS=1).

There are no errors and the GUI doesn’t show up, it simply hangs at this point.

I guess the sqlcipher plugin depends on the sqlite plugin, which is in the runtime.

Putting it to /app doesn’t work, it is ignored there.

Edit: Ok, putting it besides the binary under sqldrivers as usual is enough.