diff --git a/pkgs/by-name/op/opensplat/package.nix b/pkgs/by-name/op/opensplat/package.nix
index a4c417c9be8e..acc14b72588c 100644
--- a/pkgs/by-name/op/opensplat/package.nix
+++ b/pkgs/by-name/op/opensplat/package.nix
@@ -20,20 +20,22 @@
   fetchpatch2,
 }:
 let
-  version = "1.1.4";
   torch = python3.pkgs.torch.override { inherit cudaSupport rocmSupport; };
   # Using a normal stdenv with cuda torch gives
   # ld: /nix/store/k1l7y96gv0nc685cg7i3g43i4icmddzk-python3.11-torch-2.2.1-lib/lib/libc10.so: undefined reference to `std::ios_base_library_init()@GLIBCXX_3.4.32'
   stdenv' = if cudaSupport then cudaPackages.backendStdenv else stdenv;
 in
-stdenv'.mkDerivation {
+stdenv'.mkDerivation (finalAttrs: {
   pname = "opensplat";
-  inherit version;
+  version = "1.1.4";
+
+  __structuredAttrs = true;
+  strictDeps = true;
 
   src = fetchFromGitHub {
     owner = "pierotofy";
     repo = "OpenSplat";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-u2UmD0O3sUWELYb4CjQE19i4HUjLMcaWqOinQH0PPTM=";
   };
 
@@ -44,24 +46,34 @@ stdenv'.mkDerivation {
     })
   ];
 
-  postPatch = lib.optionalString rocmSupport ''
-        # ROCm CMake targets must be available before find_package(Torch)
-        # because Torch's Caffe2Targets.cmake references them in torch_hip_library
-        substituteInPlace CMakeLists.txt \
-          --replace-fail "find_package(Torch REQUIRED)" \
-            "find_package(hip REQUIRED)
-    find_package(hiprtc REQUIRED)
-    find_package(hipblas REQUIRED)
-    find_package(hipfft REQUIRED)
-    find_package(hiprand REQUIRED)
-    find_package(hipsparse REQUIRED)
-    find_package(hipsolver REQUIRED)
-    find_package(hipblaslt REQUIRED)
-    find_package(rocblas REQUIRED)
-    find_package(rocsolver REQUIRED)
-    find_package(miopen REQUIRED)
-    find_package(Torch REQUIRED)"
-  '';
+  postPatch = lib.optionalString rocmSupport (
+    # Recent PyTorch HIP builds no longer hipify the caching allocator namespace:
+    # the symbol stays c10::cuda::CUDACachingAllocator instead of c10::hip::HIPCachingAllocator.
+    ''
+      substituteInPlace model.cpp \
+        --replace-fail \
+          "c10::hip::HIPCachingAllocator::emptyCache();" \
+          "c10::cuda::CUDACachingAllocator::emptyCache();"
+    ''
+    # ROCm CMake targets must be available before find_package(Torch)
+    # because Torch's Caffe2Targets.cmake references them in torch_hip_library
+    + ''
+          substituteInPlace CMakeLists.txt \
+            --replace-fail "find_package(Torch REQUIRED)" \
+              "find_package(hip REQUIRED)
+      find_package(hiprtc REQUIRED)
+      find_package(hipblas REQUIRED)
+      find_package(hipfft REQUIRED)
+      find_package(hiprand REQUIRED)
+      find_package(hipsparse REQUIRED)
+      find_package(hipsolver REQUIRED)
+      find_package(hipblaslt REQUIRED)
+      find_package(rocblas REQUIRED)
+      find_package(rocsolver REQUIRED)
+      find_package(miopen REQUIRED)
+      find_package(Torch REQUIRED)"
+    ''
+  );
 
   nativeBuildInputs = [
     cmake
@@ -107,7 +119,11 @@ stdenv'.mkDerivation {
       NIX_LDFLAGS = "-L${lib.getOutput "stubs" cudaPackages.cuda_cudart}/lib/stubs"; # fixes -lcuda not found
     }
     // lib.optionalAttrs rocmSupport {
-      HIPFLAGS = "-I${lib.getInclude rocmPackages.rocthrust}/include -I${lib.getInclude rocmPackages.rocprim}/include";
+      PYTORCH_ROCM_ARCH = torch.gpuTargetString;
+      HIPFLAGS = toString [
+        "-I${lib.getInclude rocmPackages.rocprim}/include"
+        "-I${lib.getInclude rocmPackages.rocthrust}/include"
+      ];
     };
 
   cmakeFlags = [
@@ -139,4 +155,4 @@ stdenv'.mkDerivation {
     ];
     platforms = lib.platforms.linux ++ lib.optionals (!cudaSupport) lib.platforms.darwin;
   };
-}
+})