Error when rebuilding cuda cudnn (badPlatforms)

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Hi, I’m getting this error when rebuilding 26.11:

       error: Package ‘cuda12.8-cudnn-9.13.0.50’ in /nix/store/kfcxqcxb9hcq6x33sg4cmwakbb1ifwg9-source/pkgs/development/cuda-modules/packages/cudnn.nix:100 is not available on the reques
ted hostPlatform:
         hostPlatform.system = "x86_64-linux"
         package.meta.platforms = [
           "aarch64-linux"
           "x86_64-linux"
         ]
         package.meta.badPlatforms = [
           "x86_64-linux"
         ]
       , refusing to evaluate.

Seems something is flagging x86_64 as badPlatform, but I can’t figure out where to look or what to change.

Any pointers?