diff --git a/pkgs/by-name/ol/ollama/package.nix b/pkgs/by-name/ol/ollama/package.nix
index 2eaba9c0c4f0..772fedf6fd96 100644
--- a/pkgs/by-name/ol/ollama/package.nix
+++ b/pkgs/by-name/ol/ollama/package.nix
@@ -100,6 +100,9 @@ let
       (lib.getOutput "static" cudaPackages.cuda_cudart)
       (lib.getBin (cudaPackages.cuda_nvcc.__spliced.buildHost or cudaPackages.cuda_nvcc))
     ];
+
+    # cuda_ccl and cuda_cudart both have a LICENSE file in their output
+    ignoreCollisions = true;
   };
 
   cudaPath = lib.removeSuffix "-${cudaMajorVersion}" cudaToolkit;
diff --git a/pkgs/development/cuda-modules/packages/cuda_cccl.nix b/pkgs/development/cuda-modules/packages/cuda_cccl.nix
index ee0839f6aa5b..e49e0aa8427c 100644
--- a/pkgs/development/cuda-modules/packages/cuda_cccl.nix
+++ b/pkgs/development/cuda-modules/packages/cuda_cccl.nix
@@ -1,7 +1,9 @@
 {
   buildRedist,
   cudaAtLeast,
+  cudaOlder,
   lib,
+  fetchpatch,
 }:
 buildRedist {
   redistName = "cuda";
@@ -23,6 +25,18 @@ buildRedist {
     rmdir -v "$PWD/include/cccl"
   '';
 
+  patches = lib.optionals (cudaAtLeast "12.9" && cudaOlder "13.0") [
+    # Fix missing _CCCL_PP_SPLICE_WITH_IMPL20 in preprocessor.h
+    # https://github.com/NVIDIA/cccl/issues/4967
+    # https://github.com/NVIDIA/cccl/pull/4972
+    (fetchpatch {
+      name = "fix-missing-_CCCL_PP_SPLICE_WITH_IMPL20";
+      url = "https://github.com/NVIDIA/cccl/commit/2c2276d8b19d737cb16811ce2eb761030f472e60.patch";
+      stripLen = 1;
+      hash = "sha256-hYfMFsd7Y8CwuNGaPYG6uEB+lg1TmWSIIU5ToVMULKY=";
+    })
+  ];
+
   # NVIDIA, in their wisdom, expect CCCL to be a directory inside include.
   # https://github.com/NVIDIA/cutlass/blob/087c84df83d254b5fb295a7a408f1a1d554085cf/CMakeLists.txt#L773
   postInstall = lib.optionalString (cudaAtLeast "13.0") ''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9732092816f4..3336049b8904 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2151,7 +2151,7 @@ with pkgs;
     cudaPackages_13_2
     ;
 
-  cudaPackages_12 = cudaPackages_12_8;
+  cudaPackages_12 = cudaPackages_12_9;
 
   cudaPackages_13 = cudaPackages_13_0;