Overriding kernel/common-config

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I’m trying to disable some options (like CONFIG_BPF) that seem to be set in kernel/common-config.nix.

    boot.kernelPackages = pkgs.linuxPackagesFor                                                                                                                                                                                                                                  
      (                                                                                                                                                                                                                                                                     
        pkgs.linuxPackages_6_5.kernel.override {                                                                                                                                                                                                                            
          ignoreConfigErrors = true;                                                                                                                                                                                                                                        
        }                                                                                                                                                                                                                                                                   
      );    

    boot.kernelPatches = [
      {
        name = "osef";
        patch = null;
        extraStructuredConfig = with lib.kernel {
          BPF = lib.mkForce no;
        };
      }
    ];

However building the config still yields CONFIG_BPF=y without any warning :

$ grep CONFIG_BPF $(nix build --no-link --print-out-paths .#nixosConfigurations.nixos-mini-newton.config.boot.kernelPackages.kernel.configfile)
CONFIG_BPF=y

Is there an easy way to force my patch ? Thanks.

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