Help needed finding Boost build

[Pander]

Hi all,

I'm making a Flatpak for Nuspell, a modern C++-17 spell checker funded
by Mozilla which supports Hunspell dictionaries. See also
https://nuspell.github.io/

I'm able to build Boost, however, building of our application is not
finding it. Could somebody help with this please?

The YAML file and build script is found at
https://github.com/nuspell/misc-nuspell/tree/master/packaging/flatpak

Thanks,

Pander