diff --git a/pkgs/development/cuda-modules/cudnn/fixup.nix b/pkgs/development/cuda-modules/cudnn/fixup.nix
index 26c8ec63f13e..183f38cfd4cf 100644
--- a/pkgs/development/cuda-modules/cudnn/fixup.nix
+++ b/pkgs/development/cuda-modules/cudnn/fixup.nix
@@ -38,12 +38,19 @@ finalAttrs: prevAttrs: {
     ++ lists.optionals finalAttrs.passthru.useCudatoolkitRunfile [ final.cudatoolkit ]
     ++ lists.optionals (!finalAttrs.passthru.useCudatoolkitRunfile) [ final.libcublas.lib ];
 
-  # Tell autoPatchelf about runtime dependencies.
+  # Tell autoPatchelf about runtime dependencies. *_infer* libraries only
+  # exist in CuDNN 8.
   # NOTE: Versions from CUDNN releases have four components.
-  postFixup = strings.optionalString (strings.versionAtLeast finalAttrs.version "8.0.5.0") ''
-    ${meta.getExe' patchelf "patchelf"} $lib/lib/libcudnn.so --add-needed libcudnn_cnn_infer.so
-    ${meta.getExe' patchelf "patchelf"} $lib/lib/libcudnn_ops_infer.so --add-needed libcublas.so --add-needed libcublasLt.so
-  '';
+  postFixup =
+    strings.optionalString
+      (
+        strings.versionAtLeast finalAttrs.version "8.0.5.0"
+        && strings.versionOlder finalAttrs.version "9.0.0.0"
+      )
+      ''
+        ${meta.getExe patchelf} $lib/lib/libcudnn.so --add-needed libcudnn_cnn_infer.so
+        ${meta.getExe patchelf} $lib/lib/libcudnn_ops_infer.so --add-needed libcublas.so --add-needed libcublasLt.so
+      '';
 
   passthru.useCudatoolkitRunfile = strings.versionOlder cudaVersion "11.3.999";
 
diff --git a/pkgs/development/cuda-modules/cudnn/releases.nix b/pkgs/development/cuda-modules/cudnn/releases.nix
index a0e9d8083b7a..26acaf4a3640 100644
--- a/pkgs/development/cuda-modules/cudnn/releases.nix
+++ b/pkgs/development/cuda-modules/cudnn/releases.nix
@@ -257,6 +257,21 @@
         url = "https://developer.download.nvidia.com/compute/cudnn/redist/cudnn/linux-x86_64/cudnn-linux-x86_64-8.9.7.29_cuda12-archive.tar.xz";
         hash = "sha256-R1MzYlx+QqevPKCy91BqEG4wyTsaoAgc2cE++24h47s=";
       }
+      {
+        version = "9.3.0.75";
+        minCudaVersion = "12.0";
+        maxCudaVersion = "12.6";
+        url = "https://developer.download.nvidia.com/compute/cudnn/redist/cudnn/linux-x86_64/cudnn-linux-x86_64-9.3.0.75_cuda12-archive.tar.xz";
+        hash = "sha256-PW7xCqBtyTOaR34rBX4IX/hQC73ueeQsfhNlXJ7/LCY=";
+      }
+      {
+        version = "9.3.0.75";
+        minCudaVersion = "11.8";
+        maxCudaVersion = "11.8";
+        url = "https://developer.download.nvidia.com/compute/cudnn/redist/cudnn/linux-x86_64/cudnn-linux-x86_64-9.3.0.75_cuda11-archive.tar.xz";
+        hash = "sha256-Bp2ghM02jzn7gw1MTpMYAwZPtl52b0z33y2ko0aiup8";
+      }
+
     ];
   };
 }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 7a0f13357230..553c1020ca20 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2696,8 +2696,14 @@ self: super: with self; {
 
   cufflinks = callPackage ../development/python-modules/cufflinks { };
 
-  # cupy 12.2.0 possibly incompatible with cutensor 2.0 that comes with cudaPackages_12
-  cupy = callPackage ../development/python-modules/cupy { cudaPackages = pkgs.cudaPackages_11; };
+  cupy = callPackage ../development/python-modules/cupy {
+    # cupy 12.2.0 possibly incompatible with cutensor 2.0 that comes with cudaPackages_12
+    cudaPackages = pkgs.cudaPackages_11.overrideScope (cu-fi: _: {
+      # CuDNN 9 is not supported:
+      # https://github.com/cupy/cupy/issues/8215
+      cudnn = cu-fi.cudnn_8_9;
+    });
+  };
 
   curio = callPackage ../development/python-modules/curio { };