Set up nix environment for building vms

configuration.nix

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+{ self, pkgs, tidal-tools, ... }: {
+  nix = {
+    extraOptions = ''
+      experimental-features = nix-command flakes
+    '';
+    settings = {
+      trusted-users = [ "root" "tidal" ];
+      auto-optimise-store = true;
+    };
+  };
+
+  networking.hostName = "Nix"; # Define your hostname.
+
+  # Pick only one of the below networking options.
+  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+  # networking.networkmanager.enable = true; # Easiest to use and most distros use this by default.
+
+  users.users.tidal = {
+    isNormalUser = true;
+    password = "tidal";
+    extraGroups = [ "networkmanager" "wheel" "video" "kvm" ];
+  };
+
+  environment = {
+    systemPackages = with pkgs; [
+      tidal-tools.packages.x86_64-linux.default
+      docker
+      python311
+      python311Packages.pip
+      nmap
+      jq
+    ];
+  };
+
+  services.xserver.enable = true;
+  services.xserver.displayManager.sddm.enable = true;
+  services.xserver.desktopManager.plasma5.enable = true;
+
+  services.dbus.enable = true;
+  virtualisation.docker.enable = true;
+}

flake.nix

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+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixos-generators = {
+      url = "github:nix-community/nixos-generators";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    tidal-tools = {
+      url = "git+ssh://[email protected]/tidalmigrations/tidal-tools?ref=main&rev=34550d4abc304c1428465ab09b0f558c075f1c35";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+  outputs = { self, nixpkgs, nixos-generators, tidal-tools, ... }:
+    let
+      pkgs = nixpkgs.legacyPackages.x86_64-linux;
+    in
+    {
+      packages.x86_64-linux = {
+        hyperv = nixos-generators.nixosGenerate {
+          specialArgs = {
+            tidal-tools = tidal-tools;
+          };
+          system = "x86_64-linux";
+          modules = [
+            ./configuration.nix
+          ];
+          format = "hyperv";
+        };
+        azure = nixos-generators.nixosGenerate {
+          specialArgs = {
+            tidal-tools = tidal-tools;
+          };
+          system = "x86_64-linux";
+          modules = [
+            ./configuration.nix
+          ];
+          format = "azure";
+        };
+        vbox = nixos-generators.nixosGenerate {
+          system = "
+        x86_64-linux ";
+          modules = [
+            # you can include your own nixos configuration here, i.e.
+            ./configuration.nix
+          ];
+          format = "virtualbox";
+        };
+
+        # hack stolen from
+        # https://github.com/nix-community/nixos-generators/issues/128#issuecomment-1484084499
+        vmware =
+          let
+            base = nixos-generators.nixosGenerate {
+              system = "x86_64-linux";
+              modules = [
+                # you can include your own nixos configuration here, i.e.
+                ./configuration.nix
+                ./vmware.nix
+              ];
+              format = "virtualbox";
+            };
+            vmx = "vmx-20";
+          in
+          pkgs.runCommand "vbox"
+            { } ''
+            ova=${base}/*.ova
+            mkdir $out
+            # cp $ova "$out/unfixed.ova"  # debug
+            ${pkgs.cot}/bin/cot --force --verbose edit-product $ova -p 'Some Info' -o nixos.ova
+            ${pkgs.cot}/bin/cot --force --verbose edit-hardware nixos.ova -v ${vmx}
+            tar xf nixos.ova
+            sed -i -E 's/^(\s*<(ovf:)?ProductSection)>\s*$/\1 ovf:required="false">/' *.ovf
+            sed -i -E "s/^(SHA1\(nixos.ovf\)=\s*).*$/\1$(sha1sum nixos.ovf | cut -d ' ' -f 1)/" *.mf
+            ${pkgs.ovftool}/bin/ovftool --lax --sourceType=OVF --targetType=OVA nixos.ovf $out/nixos.ova
+            # tar cf $out/nixos.ova *.ovf *.mf *.vmdk
+          '';
+
+        qemu = nixos-generators.nixosGenerate {
+          system = "x86_64-linux";
+          modules = [
+            # you can include your own nixos configuration here, i.e.
+            ./configuration.nix
+          ];
+          format = "vm";
+          specialArgs = {
+            tidal-tools = tidal-tools;
+          };
+        };
+      };
+      devShells.x86_64-linux.default = pkgs.mkShell {
+        buildInputs = [ pkgs.qemu pkgs.virtualbox pkgs.vmware-workstation pkgs.ovftool pkgs.cot ];
+      };
+    };
+}

vmware.nix

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+{ self, pkgs, ... }: {
+  virtualbox = {
+    # see: https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/virtualisation/virtualbox-image.nix
+    memorySize = 4000; # MiB
+    params = {
+      audio = "none";
+      audioout = "off";
+    };
+  };
+  virtualisation.vmware.guest.enable = true;
+}