I made a video of my microscope build

Hello Vince and everyone else,
I followed the exact steps you included on both of your videos. However, I am having trouble uploading the arduino sketch to the Arduino Nano with Processor ATMega328P. I have uploaded the Sangaboard sketch (Sangaboard firmware) onto the nano, however I get an error message that says “StepperF_alt.h: No such file or directory” I am aware that this is a library that needs to be included onto the sketch manually. I have installed the other Adafruit libraries too so I think the StepperF_alt.h is the only one that is missing.
Is there any way you can include the steps you followed to load the software onto the microcontroller. I already installed the raspbian OpenFlexure os onto the raspberry pi 4 and it seems to be working fine. I tested the pi camera using OpenFlexure connect and it seems to be working fine too. The only thing left to do after following your video and reading the documentation on the OpenFlexure repository is the stepper motors.
Thank you.