diff --git a/pkgs/development/cuda-modules/generic-builders/multiplex.nix b/pkgs/development/cuda-modules/generic-builders/multiplex.nix
index ce50653bb5d4..15dd0c938f62 100644
--- a/pkgs/development/cuda-modules/generic-builders/multiplex.nix
+++ b/pkgs/development/cuda-modules/generic-builders/multiplex.nix
@@ -81,7 +81,7 @@ let
   redistArch = flags.getRedistArch hostPlatform.system;
 
   preferable =
-    p1: p2: (isSupported p2 -> isSupported p1) && (strings.versionAtLeast p1.version p2.version);
+    p1: p2: (isSupported p2 -> isSupported p1) && (strings.versionOlder p2.version p1.version);
 
   # All the supported packages we can build for our platform.
   # perSystemReleases :: List Package
diff --git a/pkgs/development/python-modules/torch/source/default.nix b/pkgs/development/python-modules/torch/source/default.nix
index 3fd0e9d11ee7..187d7821b2cd 100644
--- a/pkgs/development/python-modules/torch/source/default.nix
+++ b/pkgs/development/python-modules/torch/source/default.nix
@@ -364,7 +364,7 @@ buildPythonPackage rec {
     ''
     + lib.optionalString (cudaSupport && cudaPackages ? cudnn) ''
       export CUDNN_INCLUDE_DIR=${lib.getLib cudnn}/include
-      export CUDNN_LIB_DIR=${cudnn.lib}/lib
+      export CUDNN_LIB_DIR=${lib.getLib cudnn}/lib
     ''
     + lib.optionalString rocmSupport ''
       export ROCM_PATH=${rocmtoolkit_joined}