Do not install chromium or catt on neelix.

nix/configuration/hosts/odo/default.nix

@@ -31,6 +31,9 @@
 
   me.alacritty.enable = true;
   me.ansible.enable = true;
+  me.ares.enable = true;
+  me.chromecast.enable = true;
+  me.chromium.enable = true;
   me.emacs_flavor = "full";
   me.graphical = true;
   me.graphicsCardType = "amd";

nix/configuration/roles/ares/default.nix

@@ -8,7 +8,23 @@
 {
   imports = [ ];
 
-  environment.systemPackages = with pkgs; [
-    ares
-  ];
+  options.me = {
+    ares.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install ares.";
+    };
+  };
+
+  config = lib.mkIf config.me.ares.enable (
+    lib.mkMerge [
+      { }
+      (lib.mkIf config.me.graphical {
+        environment.systemPackages = with pkgs; [
+          ares
+        ];
+      })
+    ]
+  );
 }

nix/configuration/roles/chromecast/default.nix

@@ -8,7 +8,24 @@
 {
   imports = [ ];
 
-  environment.systemPackages = with pkgs; [
-    catt
-  ];
+  options.me = {
+    chromecast.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install chromecast.";
+    };
+  };
+
+  config = lib.mkIf config.me.chromecast.enable (
+    lib.mkMerge [
+      {
+        environment.systemPackages = with pkgs; [
+          catt
+        ];
+      }
+      (lib.mkIf config.me.graphical {
+      })
+    ]
+  );
 }

nix/configuration/roles/chromium/default.nix

@@ -8,45 +8,58 @@
 {
   imports = [ ];
 
-  # TODO: Read https://bbs.archlinux.org/viewtopic.php?pid=2209507#p2209507 and apply desired settings.
-
-  environment.systemPackages = with pkgs; [
-    (chromium.override { enableWideVine = true; })
-  ];
-
-  allowedUnfree = [
-    "chromium"
-    "chromium-unwrapped"
-    "widevine-cdm"
-  ];
-
-  environment.persistence."/persist" = lib.mkIf (!config.me.buildingIso) {
-    hideMounts = true;
-    users.talexander = {
-      directories = [
-        {
-          directory = ".config/chromium";
-          user = "talexander";
-          group = "talexander";
-          mode = "0700";
-        }
-      ];
-    };
-  };
-  environment.persistence."/state" = lib.mkIf (!config.me.buildingIso) {
-    hideMounts = true;
-    users.talexander = {
-      directories = [
-        {
-          directory = ".cache/chromium";
-          user = "talexander";
-          group = "talexander";
-          mode = "0700";
-        }
-      ];
+  options.me = {
+    chromium.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install chromium.";
     };
   };
 
-  # Enabling vulkan causes video to render as white
-  # nixpkgs.config.chromium.commandLineArgs = "--enable-features=Vulkan";
+  config = lib.mkIf config.me.chromium.enable (
+    lib.mkMerge [
+      { }
+      (lib.mkIf config.me.graphical {
+        environment.systemPackages = with pkgs; [
+          (chromium.override { enableWideVine = true; })
+        ];
+        allowedUnfree = [
+          "chromium"
+          "chromium-unwrapped"
+          "widevine-cdm"
+        ];
+
+        environment.persistence."/persist" = lib.mkIf (!config.me.buildingIso) {
+          hideMounts = true;
+          users.talexander = {
+            directories = [
+              {
+                directory = ".config/chromium";
+                user = "talexander";
+                group = "talexander";
+                mode = "0700";
+              }
+            ];
+          };
+        };
+        environment.persistence."/state" = lib.mkIf (!config.me.buildingIso) {
+          hideMounts = true;
+          users.talexander = {
+            directories = [
+              {
+                directory = ".cache/chromium";
+                user = "talexander";
+                group = "talexander";
+                mode = "0700";
+              }
+            ];
+          };
+        };
+
+        # Enabling vulkan causes video to render as white
+        # nixpkgs.config.chromium.commandLineArgs = "--enable-features=Vulkan";
+      })
+    ]
+  );
 }