Specified `dist: xenial` but trsty build machine is fired up

https://travis-ci.com/Lin-Buo-Ren/pre-commit-snap/jobs/194504808

Build system information
Build language: undefined
Build group: stable
Build dist: xenial
Build id: 109075748
Job id: 194504808
Runtime kernel version: 4.4.0-104-generic
travis-build version: dc5971f8f
Build image provisioning date and time
Mon Jan 8 21:40:22 UTC 2018
Operating System Details
Distributor ID: Ubuntu
Description: Ubuntu 14.04.5 LTS
Release: 14.04
Codename: trusty

Please help.

Try setting a valid language value.

Imprint