Hello all, TL;DR: If you pull core develop, be sure to pull newt develop at the same time. Otherwise, your builds will fail.
I just pushed a fix to the develop branch for this issue: https://issues.apache.org/jira/browse/MYNEWT-365 Unfortunately, this fix introduces an incompatibility with the core repo. Specifically, the compiler.yml definitions had to change a bit. More details are available in the ticket and the commit messages. Please let me know if there are any questions. Thanks, Chris