feat(packages): add ds4 package with ROCm/Strix Halo backend

Add antirez/ds4 — DeepSeek V4 Flash/PRO local inference engine built
with the ROCm strix-halo target for AMD Radeon 8060S (gfx1151).
Wires up all 8 ROCm transitive dependencies (clr, hipblas, hipblas-common,
hipblaslt, hipcub, rocblas, rocprim, rocwmma) via explicit include/lib paths.

README.md

@@ -15,6 +15,7 @@ A custom Nix overlay and flake providing additional packages not found in upstre
 | `aionui` | Free, open-source, Cowork app with AI Agents | AI Coding Agents |
 | `container-use` | Containerized environments for coding agents | AI Coding Agents |
 | `desloppify` | Multi-language codebase health scanner and technical debt tracker for AI agents | AI Coding Agents |
+| `ds4` | DeepSeek 4 Flash and PRO local inference engine for ROCm (Strix Halo) | AI Inference |
 | `freebuff` | The world's strongest free coding agent | AI Coding Agents |
 | `graphify` | Turn any folder of code, docs, papers, images, or videos into a queryable knowledge graph | AI Coding Agents |
 | `hipengine` | ROCm-native local LLM inference engine with torch-free runtime for AMD RDNA GPUs | AI Inference |
@@ -115,6 +116,7 @@ nix-overlay/
 │   ├── container-use/          # Containerized environments for coding agents
 │   ├── default/                # Meta-package listing all packages
 │   ├── desloppify/             # Codebase health scanner for AI agents
+│   ├── ds4/                    # DeepSeek V4 Flash/PRO inference engine (ROCm)
 │   ├── flake-inputs/           # Utility for caching flake inputs
 │   ├── freebuff/               # Free coding agent (Codebuff)
 │   ├── graphify/               # Knowledge graph generator for code folders

packages/ds4/default.nix

@@ -0,0 +1,2 @@
+{ pkgs, ... }:
+pkgs.callPackage ./package.nix { }

packages/ds4/package.nix

@@ -0,0 +1,102 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  gnumake,
+  rocmPackages,
+  autoPatchelfHook,
+}:
+
+stdenv.mkDerivation {
+  pname = "ds4";
+  version = "0-unstable-2026-06-17";
+
+  src = fetchFromGitHub {
+    owner = "antirez";
+    repo = "ds4";
+    rev = "80ebbc396aee40eedc1d829222f3362d10fa4c6c";
+    hash = "sha256-Ieuc72GHZs20ModQfnvI5Me31n4Pj+WFYtsuqaKJceo=";
+  };
+
+  nativeBuildInputs = [
+    gnumake
+    rocmPackages.hipcc
+    autoPatchelfHook
+  ];
+
+  buildInputs = [
+    rocmPackages.clr
+    rocmPackages.hipblas
+    rocmPackages.hipblas-common
+    rocmPackages.hipblaslt
+    rocmPackages.hipcub
+    rocmPackages.rocblas
+    rocmPackages.rocprim
+    rocmPackages.rocwmma
+  ];
+
+  # STRIXHALO.md: rocwmma/internal/ headers may be missing in distro packages.
+  # nixpkgs builds rocwmma from source so all headers (including internal/) are present.
+  # ROCM_ARCH defaults to gfx1151 (Strix Halo / Radeon 8060S) in the upstream Makefile.
+  buildPhase = ''
+    runHook preBuild
+
+    make strix-halo -j"$NIX_BUILD_CORES" \
+      HIPCC="${rocmPackages.hipcc}/bin/hipcc" \
+      ROCM_CFLAGS="-O3 -ffast-math -g -fno-finite-math-only -pthread -D__HIP_PLATFORM_AMD__ -Wno-unused-command-line-argument --offload-arch=gfx1151 \
+        -I${rocmPackages.clr}/include \
+        -I${rocmPackages.hipblas}/include \
+        -I${rocmPackages.hipblas-common}/include \
+        -I${rocmPackages.hipblaslt}/include \
+        -I${rocmPackages.hipcub}/include \
+        -I${rocmPackages.rocblas}/include \
+        -I${rocmPackages.rocprim}/include \
+        -I${rocmPackages.rocwmma}/include" \
+      ROCM_LDLIBS="-lm -pthread \
+        -L${rocmPackages.hipblas}/lib -lhipblas \
+        -L${rocmPackages.hipblaslt}/lib -lhipblaslt \
+        -L${rocmPackages.rocblas}/lib -lrocblas \
+        -L${rocmPackages.clr}/lib -lamdhip64"
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    cp ds4 ds4-server ds4-bench ds4-eval ds4-agent $out/bin/
+
+    runHook postInstall
+  '';
+
+  passthru = {
+    category = "AI Inference";
+    updateScript = [
+      "nix-update"
+      "--flake"
+      "--version=branch=main"
+      ".#ds4"
+    ];
+  };
+
+  meta = {
+    description = "DeepSeek 4 Flash and PRO local inference engine for ROCm (Strix Halo)";
+    longDescription = ''
+      DS4 is a self-contained local inference engine specifically built for
+      DeepSeek V4 Flash and PRO. It bundles a CLI, HTTP server, and native
+      coding agent. This package is built with the ROCm backend for AMD
+      Strix Halo GPUs (gfx1151, Radeon 8060S).
+
+      Runtime requirements (from STRIXHALO.md):
+      - User must be in 'render' and 'video' groups for /dev/kfd and DRM access
+      - GPU-visible memory must be increased via kernel parameters:
+        amd_iommu=off amdgpu.gttsize=126976 ttm.pages_limit=32505856 ttm.page_pool_size=32505856
+    '';
+    homepage = "https://github.com/antirez/ds4";
+    changelog = "https://github.com/antirez/ds4/commits/main";
+    license = lib.licenses.mit;
+    platforms = [ "x86_64-linux" ];
+    mainProgram = "ds4";
+  };
+}