where to find bootloader file?

[lamoboos223]

avrdude: erasing chip
avrdude: reading input file "C:\development\electronics\Arduino\hardware\breadboard\avr/bootloaders/{bootloader.file}"
avrdude: can't open input file C:\development\electronics\Arduino\hardware\breadboard\avr/bootloaders/{bootloader.file}: No such file or directory
avrdude: read from file 'C:\development\electronics\Arduino\hardware\breadboard\avr/bootloaders/{bootloader.file}' failed

[lamoboos223]

i need the .hex files

[carlosefr]

I'm not sure I understand the question. The board definitions in this repo are meant for running programs on ATmega MCUs without any bootloader.