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

@@ -8,16 +8,31 @@
 {
   imports = [ ];
 
-  environment.systemPackages = with pkgs; [
+  options.me = {
-    (python3.withPackages (python-pkgs: [
+    python.enable = lib.mkOption {
-      python-pkgs.distro # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
+      type = lib.types.bool;
-      python-pkgs.pyudev # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
+      default = false;
-      python-pkgs.systemd # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
+      example = true;
-      python-pkgs.packaging # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
+      description = "Whether we want to install python.";
-    ]))
+    };
-    poetry
+  };
-    pyright
+
-    isort
+  config = lib.mkIf config.me.python.enable (
-    black
+    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
+            python-pkgs.pyudev # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
+            python-pkgs.systemd # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
+            python-pkgs.packaging # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
+          ]))
+          poetry
+          pyright
+          isort
+          black
+        ];
+      }
+    ]
+  );
 }

nix/configuration/roles/qemu/default.nix

@@ -8,7 +8,22 @@
 {
   imports = [ ];
 
-  environment.systemPackages = with pkgs; [
+  options.me = {
-    qemu
+    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

@@ -8,31 +8,46 @@
 {
   imports = [ ];
 
-  environment.systemPackages = with pkgs; [
+  options.me = {
-    rustup
+    rust.enable = lib.mkOption {
-    lldb # for lldb-vscode
+      type = lib.types.bool;
-    musl # for building static binaries
+      default = false;
-    rust-analyzer
+      example = true;
-    cargo-semver-checks
+      description = "Whether we want to install rust.";
-    # ? cargo-bloat
-    # ? cargo-outdated
-    # ? cargo-public-api
-  ];
-
-  home-manager.users.talexander =
-    { pkgs, ... }:
-    {
-      home.file = {
-        ".cargo/config.toml" = {
-          source = ./files/cargo_config.toml;
-        };
-        # # TODO: Figure out what to do with credentials.
-        # ".cargo/credentials.toml" = {
-        #   source = ./files/cargo_credentials.toml;
-        # };
-      };
     };
+  };
 
+  config = lib.mkIf config.me.rust.enable (
+    lib.mkMerge [
+      {
+        environment.systemPackages = with pkgs; [
+          rustup
+          lldb # for lldb-vscode
+          musl # for building static binaries
+          rust-analyzer
+          cargo-semver-checks
+          # ? cargo-bloat
+          # ? cargo-outdated
+          # ? cargo-public-api
+        ];
+
+        home-manager.users.talexander =
+          { pkgs, ... }:
+          {
+            home.file = {
+              ".cargo/config.toml" = {
+                source = ./files/cargo_config.toml;
+              };
+              # # TODO: Figure out what to do with credentials.
+              # ".cargo/credentials.toml" = {
+              #   source = ./files/cargo_credentials.toml;
+              # };
+            };
+          };
+
+      }
+    ]
+  );
 }
 
 # TODO: Install clippy, cranelift, rust-src