feat: Get ROCm working with flake

crossbox.nix

@@ -1,9 +1,24 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
+let
+  # Using nixos-24.05 for bisq-desktop (last stable release with working bisq-desktop)
+  # bisq-desktop was removed after 24.05 due to OpenJFX EOL issues
+  bisqPkgs = import (builtins.fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs/archive/nixos-24.05.tar.gz";
+    sha256 = "0zydsqiaz8qi4zd63zsb2gij2p614cgkcaisnk11wjy3nmiq0x1s";
+  }) { system = pkgs.system; };
+in
 {
+  environment.systemPackages = with pkgs; [
+    bisqPkgs.bisq-desktop  # v1.9.15-1.9.17 from nixos-24.05
+    bisq2
+    llamacpp-rocm-bin-gfx1151
+    lmstudio
+  ];
+
   networking.hostName = "crossbox";
   system.stateVersion = "25.11";
-  networking.firewall.allowedTCPPorts = [ 22 ];
+  networking.firewall.allowedTCPPorts = [ 22 1234 ];
   services.pulseaudio.enable = false;
 
   hardware.graphics = {
@@ -16,6 +31,17 @@
     ];
   };
 
+  boot.kernelParams = [ "amdgpu.gttsize=115200" ];
+  boot.kernelPackages = pkgs.linuxPackages_latest;
+
+  # ROCm environment for gfx1151 (Strix Halo)
+  # gfx1151 lacks TensileLibrary support in most ROCm builds,
+  # so we override to gfx1100 which is close enough and has full library support.
+  # The strix-halo overlay's llamacpp binaries override this with 11.5.1 in their wrappers.
+  environment.variables = {
+    HSA_OVERRIDE_GFX_VERSION = "11.0.0";
+  };
+
   # List services that you want to enable:
   services.openssh = {
     enable = true;