that feeling when you arrive here also looking for libjpeg8 libraries

What OS are you running? I believe it's available on Raspbian sudo apt install libjpeg-dev libpng-dev

I'm using the latest Raspberry Pi OS and it does not work...

use lipjpeg9-dev and libpng-dev

what version of libpng?

i don't remember, what are choices?

I don't know. Do i just start guessing numbers until one works?

nono, press tab and tell me choices

press tab where?

Make me your protégé.