Due to Debian's weirdness (non-conformance with established multi-arch standards), it is not possible to bootstrap in the Ubuntu environment that Travis CI provides.

More information:
http://wiki.debian.org/Multiarch/TheCaseForMultiarch#Current_practices (i.e. established standards)
http://wiki.debian.org/Multiarch/TheCaseForMultiarch#Proposed_Solution (a 'let's be zealots just because we can' solution as usual)
Add note about gpac and freenect compatibility