Add CUDA support

I bothered with that only to realize that I'm not using proprietary drivers 🙃

options.nix

@@ -12,6 +12,7 @@ in
       description = "top-level flake";
       type = lib.types.attrs;
     };
+    cuda = lib.mkEnableOption "Use CUDA for some libraries";
     extra = lib.mkEnableOption "Big software";
     gaming = lib.mkEnableOption "Games";
     polarity = lib.mkOption {

os/cuda/default.nix

@@ -0,0 +1,31 @@
+# Need nvidia proprietary drivers to work
+{ pkgs, nixpkgs, config, lib, ... }:
+{
+  config = lib.mkIf config.frogeye.cuda {
+    nix.settings = {
+      substituters = [
+        "https://cuda-maintainers.cachix.org"
+      ];
+      trusted-public-keys = [
+        "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
+      ];
+    };
+    nixpkgs.overlays = [
+      (self: super:
+        let
+          pkgs_uf = import nixpkgs {
+            inherit (super) system;
+            config.allowUnfree = true;
+          };
+        in
+        {
+          ctranslate2 = (pkgs_uf.ctranslate2.override {
+            withCUDA = true;
+            withCuDNN = true;
+            stdenv = pkgs.gcc12Stdenv; # 24.11 Remove, as nvcc and gcc versions align again
+            # Takes more than 16 GiB RAM to compile with the above, but fine if not
+          });
+        })
+    ];
+  };
+}

os/default.nix

@@ -6,6 +6,7 @@
     ./battery.nix
     ./boot
     ./ccc
+    ./cuda
     ./common.nix
     ./desktop
     ./dev