here we go

hosts/common/extraServices/default.nix

@@ -0,0 +1,8 @@
+{
+  imports = [
+    ./flatpak.nix
+    ./podman.nix
+    ./ollama.nix
+    ./virtualisation.nix
+  ];
+}

hosts/common/extraServices/flatpak.nix

@@ -0,0 +1,20 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.extraServices.flatpak;
+in {
+  options.extraServices.flatpak.enable = mkEnableOption "enable podman";
+
+  config = mkIf cfg.enable {
+    services.flatpak.enable = true;
+    xdg.portal = {
+      # xdg desktop intergration (required for flatpak)
+      enable = true;
+      extraPortals = [pkgs.xdg-desktop-portal-gtk];
+    };
+  };
+}

hosts/common/extraServices/ollama.nix

@@ -0,0 +1,24 @@
+{
+  config,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.extraServices.ollama;
+in {
+  options.extraServices.ollama.enable = mkEnableOption "enable ollama";
+
+  config = mkIf cfg.enable {
+    services.ollama = {
+      enable = true;
+      acceleration =
+        if config.services.xserver.videoDrivers == ["amdgpu"]
+        then "rocm"
+        else if config.services.xserver.videoDrivers == ["nvidia"]
+        then "cuda"
+        else null;
+      host = "[::]";
+      openFirewall = true;
+    };
+  };
+}

hosts/common/extraServices/podman.nix

@@ -0,0 +1,32 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.extraServices.podman;
+in {
+  options.extraServices.podman.enable = mkEnableOption "enable podman";
+
+  config = mkIf cfg.enable {
+    virtualisation = {
+      podman = {
+        enable = true;
+        dockerCompat = true;
+        autoPrune = {
+          enable = true;
+          dates = "weekly";
+          flags = [
+            "--filter=until=24h"
+            "--filter=label!=important"
+          ];
+        };
+        defaultNetwork.settings.dns_enabled = true;
+      };
+    };
+    environment.systemPackages = with pkgs; [
+      podman-compose
+    ];
+  };
+}

hosts/common/extraServices/virtualisation.nix

@@ -0,0 +1,38 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.extraServices.virtualisation;
+in {
+  options.extraServices.virtualisation.enable = mkEnableOption "enable virtualisation";
+
+  config = mkIf cfg.enable {
+    virtualisation = {
+      libvirtd = {
+        enable = true;
+        qemu = {
+          package = pkgs.qemu_kvm;
+          runAsRoot = true;
+          swtpm.enable = true;
+          ovmf = {
+            enable = true;
+            packages = [
+              (pkgs.OVMF.override {
+                secureBoot = true;
+                tpmSupport = true;
+              })
+              .fd
+            ];
+          };
+        };
+      };
+    };
+    programs.virt-manager.enable = true;
+    environment.systemPackages = with pkgs; [
+      OVMFFull
+    ];
+  };
+}