Trying to build with the develop branch locally

[mdma]

Looks like you don't have dfu-suffix installed. It's usually installed as part of the dfu-utils package, which you can find here

Tutorial: Installing DFU-Driver on Windows [24 Feb 2015]

So it seems like some owners want to go slightly advanced but instructions for installing the DFU-driver is a little vague. How to put your core in DFU-mode Press on BOTH buttons Release only the Reset button Release the Mode button once the core start blinking yellow This will be the dfu-mode Pre-check! If you have somehow done this process previously but is unable to use dfu-util successfully, you will need to uninstall the DFU-driver 1st Put your core in DFU-mode Ope…