Thanks. Hmm, the MultiarchSpec page lists "Co-installable -dev packages" as an unresolved issue, but hasn't been updated since 2014. The MultiarchCross[1] page

Thanks. Hmm, the MultiarchSpec page lists "Co-installable -dev packages" as an unresolved issue, but hasn't been updated since 2014. The MultiarchCross[1] page specifically about that issue hasn't been updated since 2013. I couldn't work out what the current situation is. [1] https://wiki.ubuntu.com/MultiarchCross https://wiki.ubuntu.com/MultiarchCross