Update local build directory

[ScruffR]

Can you try make clean all ...?
You may also want to look at this post

Particle Device OS Updates Thread

Hey gang! Just a quick update that firmware repo branch latest has been deleted, and replaced by release/stable. release/stable and master have been updated to point to release/v0.6.1 You can update your local versions with either of these commands: git checkout release/stable && git pull git checkout master && git pull If you have any trouble with this, please reference this previous post Particle Firmware Updates Thread