Linux

Ubuntu:

$ sudo apt install wireguard

Debian:

# apt install wireguard

Fedora:

$ sudo dnf install wireguard-tools

Mageia:

$ sudo urpmi wireguard-tools

Arch:

$ sudo pacman -S wireguard-tools

OpenSUSE/SLE:

$ sudo zypper install wireguard-tools

Slackware:

$ sudo slackpkg install wireguard-tools

Alpine:

# apk add -U wireguard-tools

Gentoo:

# emerge wireguard-tools

Exherbo:

# cave resolve -x wireguard

NixOS:

boot.extraModulePackages = [ config.boot.kernelPackages.wireguard ];
environment.systemPackages = [ pkgs.wireguard pkgs.wireguard-tools ];

 Nix on Darwin:

$ nix-env -iA nixpkgs.wireguard-tools

OpenWRT:

# opkg install wireguard

Oracle Linux 8:

# dnf install oraclelinux-developer-release-el8
# dnf config-manager --disable ol8_developer
# dnf config-manager --enable ol8_developer_UEKR6
# dnf config-manager --save --setopt=ol8_developer_UEKR6.includepkgs='wireguard-tools*'
# dnf install wireguard-tools