- Try to enable restricted & universe repositories.
sudo add-apt-repository universe
sudo add-apt-repository restricted
2- Make an OS update :
sudo apt update
3- Install software-properties
sudo apt install software-properties-common
4- Add Deadsnakes repo :
sudo add-apt-repository ppa:deadsnakes/ppa
5- Cleanup the packages database :
sudo apt-get autoclean
6- Resolve depedencies problems :
sudo apt-get -f install
7- Install your package :
sudo apt-get install python3-dev
