ucx: fix ./configure error due to strict_deps and incorrect package

The package was failing after strict_deps was enabled because a
line-change described in the todo at the top was not made. This commit
corrects this issue and follows the guidance from the todo.

Fixes: #459635

pkgs/by-name/uc/ucx/package.nix

@@ -102,7 +102,7 @@ stdenv.mkDerivation (finalAttrs: {
     "--with-dm"
     "--with-verbs=${lib.getDev rdma-core}"
   ]
-  ++ lib.optionals enableCuda [ "--with-cuda=${cudaPackages.cuda_cudart}" ]
+  ++ lib.optionals enableCuda [ "--with-cuda=${cudaPackages.cuda_nvcc}" ]
   ++ lib.optionals enableRocm [ "--with-rocm=${rocm}" ];
 
   postInstall = ''