Error building kernel module when trying to upgrade to 24.05

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in the process of searching for the relevant config part i found the Problem. Its this module, when commenting this line out it works:
boot.extraModulePackages = [ pkgs.linuxKernel.packages.linux_6_1.v4l2loopback ];

full output:

these 5 derivations will be built:
  /nix/store/vwn2fkigisb0932db2gna4hywmyp61w7-linux-6.6.33-modules.drv
  /nix/store/gg0w6100cw0vppxpkgpkj9qkc55c92c2-linux-6.6.33-modules-shrunk.drv
  /nix/store/vm666kfbdgjfn9l3wgcc4vbfpnrbxs73-initrd-linux-6.6.33.drv
  /nix/store/9zbas7l7j20abch7agbdrli3pi8psz02-boot.json.drv
  /nix/store/vdw8laa6rfvz35hlbhy7g16b2b8prr54-nixos-system-mave-24.05.1409.cc54fb41d137.drv
building '/nix/store/vwn2fkigisb0932db2gna4hywmyp61w7-linux-6.6.33-modules.drv'...
created 22 symlinks in user environment
inconsistent kernel versions: 6.1.93
6.6.33
error: builder for '/nix/store/vwn2fkigisb0932db2gna4hywmyp61w7-linux-6.6.33-modules.drv' failed with exit code 1
error: 1 dependencies of derivation '/nix/store/vdw8laa6rfvz35hlbhy7g16b2b8prr54-nixos-system-mave-24.05.1409.cc54fb41d137.drv' failed to build