Nix
find package: search online
install prebuilt package
nix-env -ibA <PACKAGE>
install package
nix-env -iA <PACKAGE>
update nix and all nix package (use sudo -i instead if nix-channel not found)
sudo nix-channel --update && nix-env -ibA nixpkgs.nix && nix-env -ub
check and fix nix store
sudo nix-store --verify