My NixOS config using Hyper-V

configuration.nix

# NOTE: this config contains a fair amount of user-specific settings, but I
# left them in as they provide working examples (Samba, systemd services, etc.).
#
# This config is designed for the Budgie Desktop, but can easily be adapted to 
# any DE. For Hyper-V to work, blacklisting the hyperv_fb module was critical. 
#
# I am also using GRUB instead of the default systemd-boot.

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # ----- Hyper-V Guest support ----- #
  virtualisation.hypervGuest = {
    enable = true;
    videoMode = "1920x1080";
  };
  boot.blacklistedKernelModules = [ "hyperv_fb" ];
  
  # ----- GRUB bootloader ----- #
  boot.loader = {
    efi = {
      canTouchEfiVariables = true;
      efiSysMountPoint = "/boot/efi";
    };
    grub = {
      efiSupport = true;
      device = "nodev";
    };
  };

  # ----- Networking ----- #
  networking = {
    hostName = "nixos-budgie";
    networkmanager.enable = true;
    firewall = {
      enable = true;
      allowedTCPPorts = [ 22 ];
    };
  };

  # ----- Samba mounts ----- #
  fileSystems."/media/host/Downloads" = {
    device = "//dss-windows/host-Downloads";
    fsType = "cifs";
    options = [ "credentials=/root/smbcredentials" "uid=1000" "gid=1000" ];
  };

  fileSystems."/media/host/Shared-Files" = {
    device = "//dss-windows/host-Shared-Files";
    fsType = "cifs";
    options = [ "credentials=/root/smbcredentials" "uid=1000" "gid=1000" ];
  };

  # ----- systemd services ----- #
  systemd.services.btrfs_balance = {
    description = "balance of mounted BTFS file systems";
    serviceConfig = {
      Type = "simple";
      ExecStart = "/run/current-system/sw/bin/bash -l -c '/media/host/Shared-Files/btrfs_maintenance/btrfs_maintenance balance'";
    };
  };

  systemd.timers.btrfs_balance = {
    description = "Weekly balancing of BTRFS file systems";
    timerConfig = {
      Unit = "btrfs_balance.service";
      OnCalendar = "weekly";
      AccuracySec = "1h";
      Persistent = "true";
      RandomizedDelaySec = "60min";
    };
    wantedBy = [ "timers.target" ];
  };

  systemd.services.btrfs_scrub = {
    description = "scrub of mounted BTFS file systems";
    serviceConfig = {
      Type = "simple";
      ExecStart = "/run/current-system/sw/bin/bash -l -c '/media/host/Shared-Files/btrfs_maintenance/btrfs_maintenance scrub'";
    };
  };

  systemd.timers.btrfs_scrub = {
    description = "Monthly scrub of BTRFS file systems";
    timerConfig = {
      Unit = "btrfs_scrub.service";
      OnCalendar = "monthly";
      AccuracySec = "1h";
      Persistent = "true";
      RandomizedDelaySec = "60min";
    };
    wantedBy = [ "timers.target" ];
  };
  
  # Set your time zone.
  time.timeZone = "America/Los_Angeles";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  # ----- Budgie Desktop Environment ----- #
  services.xserver = {
    enable = true;
    layout = "us";
    xkbVariant = "";
    displayManager = {
      autoLogin.enable = true;
      autoLogin.user = "ajgringo619";
      lightdm.enable = true;
    };
    desktopManager.budgie.enable = true;
  };

  # ----- Printing ----- #
  services = {
    avahi = {
      enable = true;
      nssmdns = true;
      openFirewall = true;
    };
    printing = {
      enable = true;
      drivers = [ pkgs.hplip ];
    };
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.ajgringo619 = {
    isNormalUser = true;
    description = "ajgringo619";
    extraGroups = [ "networkmanager" "wheel" ];
    initialPassword = "";
    packages = with pkgs; [
      fish
      fastfetch
    ];
  };

  systemd.user.services.vm_info = {
    description = "Updates virtual machine config data";
    enable = true;
    unitConfig = {
      RequiresMountsFor = "/media/host/Shared-Files";
    };
    serviceConfig = {
      Type = "simple";
      ExecStart = "/run/current-system/sw/bin/bash -l -c 'python3 /media/host/Shared-Files/vm_info/get_vm_info_static.py'";
    };
    wantedBy = [ "default.target" ];
  };

  # ----- Packages, program settings ----- #
  nixpkgs.config.allowUnfree = true;

  boot.kernelPackages = pkgs.linuxPackages_latest;
  environment.systemPackages = with pkgs; [
    # system
    conky
    lsb-release
    xdg-user-dirs

    # development
    git
    man-pages
    man-pages-posix
    (python312Full.withPackages (ps: with ps; [
      distro
      psutil
      pyaml ]))

    # other programs
    bat
    duf
    fd
    gparted
    inxi
    lsd
    lynis
    nano
    ncdu
    nerdfonts
    nmap
    unison
  ];

  programs = {
    nano.syntaxHighlight = true;
    nano.nanorc = ''
      set atblanks
      set autoindent
      set boldtext
      set breaklonglines
      set casesensitive
      set constantshow
      set historylog
      set indicator
      set linenumbers
      set locking
      set matchbrackets "(<[{)>]}"
      set mouse
      set nonewlines
      set softwrap
      set tabsize 4
      set tabstospaces
      set trimblanks

      set titlecolor bold,white,magenta
      set promptcolor black,yellow
      set statuscolor bold,white,magenta
      set errorcolor bold,white,red
      set spotlightcolor black,orange
      set selectedcolor lightwhite,cyan
      set stripecolor ,yellow
      set scrollercolor magenta
      set numbercolor magenta
      set keycolor lightmagenta
      set functioncolor magenta

      extendsyntax python tabgives "    "
      extendsyntax makefile tabgives "  "

      bind ^X cut main
      bind ^C copy main
      bind ^V paste all
      bind ^Q exit all
      bind ^S savefile main
      bind ^F whereis all
      bind ^G findnext all
      bind ^R replace main
      unbind ^U all
      unbind ^N main
      unbind ^Y all
      unbind M-J main
      unbind M-T main
      bind ^Z undo main
      '';
  };

  # ----- Services, security settings ----- #
  services = {
    fstrim.enable = true;
    openssh.enable = true;
  };

  security = {
    rtkit.enable = true;
    sudo.wheelNeedsPassword = false;
  };

  system.stateVersion = "23.11";
}