Do not install rust on neelix.

nix/configuration/flake.lock

@@ -327,7 +327,7 @@
       },
       "locked": {
         "lastModified": 1,
-        "narHash": "sha256-5DWw7GnwVZ98HUp/UUJcyUmmy9Bh/mcQB8MQQ0t3ZRo=",
+        "narHash": "sha256-H2OXIXbpDg2ngo92lzPLYc61QM6M/d5UyHGUCSRztzA=",
         "path": "flakes/zsh-histdb",
         "type": "path"
       },

nix/configuration/hosts/odo/default.nix

@@ -44,7 +44,10 @@
   me.kubernetes.enable = true;
   me.latex.enable = true;
   me.launch_keyboard.enable = true;
-  me.sway.enable = true;
   me.lvfs.enable = true;
   me.media.enable = true;
+  me.python.enable = true;
+  me.qemu.enable = true;
+  me.rust.enable = true;
+  me.sway.enable = true;
 }

nix/configuration/roles/python/default.nix

@@ -8,6 +8,18 @@
 {
   imports = [ ];
 
+  options.me = {
+    python.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install python.";
+    };
+  };
+
+  config = lib.mkIf config.me.python.enable (
+    lib.mkMerge [
+      {
         environment.systemPackages = with pkgs; [
           (python3.withPackages (python-pkgs: [
             python-pkgs.distro # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
@@ -21,3 +33,6 @@
           black
         ];
       }
+    ]
+  );
+}

nix/configuration/roles/qemu/default.nix

@@ -8,7 +8,22 @@
 {
   imports = [ ];
 
+  options.me = {
+    qemu.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install qemu.";
+    };
+  };
+
+  config = lib.mkIf config.me.qemu.enable (
+    lib.mkMerge [
+      {
         environment.systemPackages = with pkgs; [
           qemu
         ];
       }
+    ]
+  );
+}

nix/configuration/roles/rust/default.nix

@@ -8,6 +8,18 @@
 {
   imports = [ ];
 
+  options.me = {
+    rust.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install rust.";
+    };
+  };
+
+  config = lib.mkIf config.me.rust.enable (
+    lib.mkMerge [
+      {
         environment.systemPackages = with pkgs; [
           rustup
           lldb # for lldb-vscode
@@ -34,6 +46,9 @@
           };
 
       }
+    ]
+  );
+}
 
 # TODO: Install clippy, cranelift, rust-src
 # TODO: Install rust targets x86_64-unknown-linux-musl and wasm32-unknown-unknown