Some errors from video (not too bad):
At 2:38 alternative to "dunst" is "mako"!!!
pkgs.wl-clipboard, not pkgs.wl-copy

# Enabling hyprlnd on NixOS
programs.hyprland = {
enable = true;
nvidiaPatches = true;
xwayland.enable = true;
};

environment.sessionVariables = {
# If your cursor becomes invisible
WLR_NO_HARDWARE_CURSORS = "1";
# Hint electron apps to use wayland
NIXOS_OZONE_WL = "1";
};

hardware = {
# Opengl
opengl.enable = true;

# Most wayland compositors need this
nvidia.modesetting.enable = true;
};

# waybar
(pkgs.waybar.overrideAttrs (oldAttrs: {
mesonFlags = oldAttrs.mesonFlags ++ [ "-Dexperimental=true" ];
})
)

# XDG portal
xdg.portal.enable = true;
xdg.portal.extraPortals = [ pkgs.xdg-desktop-portal-gtk ];

# Enable sound with pipewire.
sound.enable = true;
security.rtkit.enable = true;
services.pipewire = {
enable = true;
alsa.enable = true;
alsa.support32Bit = true;
pulse.enable = true;
jack.enable = true;
};

# rofi keybind
bind = $mainMod, S, exec, rofi -show drun -show-icons