Thx, I downloaded the branch “lp:~toykeeper/flashlight-firmware/fsm” because it had the code for Astrolux/Mateminco MF01 MINI. I Unzipped the tarball and found the file I needed to adjust to correct the Voltage measurement:

File: hwdef-Mateminco_MF01-Mini
Lines:
#ifndef VOLTAGE_FUDGE_FACTOR
#define VOLTAGE_FUDGE_FACTOR 5 // add 0.25V
#endif

Now that I have it, how do I run the make command in the fsm\ToyKeeper\spaghetti-monster\anduril folder?
That the part I cant figure out.