Original can be found at https://github.com/qmk/qmk_firmware.
Fedora:
$ sudo dnf install avr-gcc avr-libc dfu-programmer
$ make s60_x/rgb:my_keymap
$ make satan:my_keymap
$ make 1upkeyboards/1up60hse:my_keymap
$ sudo dfu-programmer atmega32u4 erase --force
$ sudo dfu-programmer atmega32u4 flash 1upkeyboards_1up60hse_my_keymap.hex
$ sudo dfu-programmer atmega32u4 reset