add PoC base64 functions

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/dc14ed91132ee3a26255d01d8fd0c1f5bff27b2f' (2024-07-23)
  → 'github:NixOS/nixpkgs/5e0ca22929f3342b19569b21b2f3462f053e497b' (2024-08-09)

flake.lock

@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1721743106,
-        "narHash": "sha256-adRZhFpBTnHiK3XIELA3IBaApz70HwCYfv7xNrHjebA=",
+        "lastModified": 1723175592,
+        "narHash": "sha256-M0xJ3FbDUc4fRZ84dPGx5VvgFsOzds77KiBMW/mMTnI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "dc14ed91132ee3a26255d01d8fd0c1f5bff27b2f",
+        "rev": "5e0ca22929f3342b19569b21b2f3462f053e497b",
         "type": "github"
       },
       "original": {

flake.nix

@@ -34,6 +34,7 @@
         nixpkgs.legacyPackages.${system}.nixpkgs-fmt);
 
       lib = {
+        base64 = import lib/base64.nix;
         gen-ssh-config = import lib/gen-ssh-config.nix lib;
         ssh-keys = import lib/ssh-keys.nix;
 

hosts/levi/wayland.nix

@@ -1,14 +1,7 @@
-{ config, ... }:
 {
   # NVIDIA-only using MUX switch in BIOS.
   environment.variables.MUTTER_DEBUG_FORCE_KMS_MODE = "simple";
   hardware.nvidia.modesetting.enable = true;
   hardware.nvidia.open = false;
   services.xserver.videoDrivers = [ "nvidia" ];
-
-  # Nvidia driver 555 is significant for wayland support.
-  # Currently version 555 is beta.
-  hardware.nvidia.package = builtins.trace
-    "Using beta nvidia driver"
-    config.boot.kernelPackages.nvidiaPackages.beta;
 }

lib/base64.nix

@@ -0,0 +1,15 @@
+{ runCommand }: {
+
+  b64decode = input:
+    builtins.readFile
+      (runCommand "b64decode" { } ''
+        base64 -d >$out <${builtins.toFile "input" input}
+      '');
+
+  b64encode = input:
+    builtins.readFile
+      (runCommand "b64encode" { } ''
+        base64 -w0 >$out <${builtins.toFile "input" input}
+      '');
+
+}

modules/gnome.nix

@@ -21,7 +21,9 @@ in
 
     environment.systemPackages = with pkgs; [
       gnome3.gnome-tweaks
-      gnomeExtensions.appindicator
+
+      # https://github.com/ubuntu/gnome-shell-extension-appindicator/issues/441
+      # gnomeExtensions.appindicator
 
       (writeShellScriptBin "x-terminal-emulator" ''
         exec kitty "$@"