{ lib
, fetchpatch
, kernel
, date ? "2021-12-26"
, commit ? "b034dfb24fece43a7677b9a29781495aeb62767f"
, diffHash ? "0m7qrnfrcx3dki9lmsq3jk3mcrfm99djh83gwwjh401ql0cycx5p"
, kernelPatches # must always be defined in bcachefs' all-packages.nix entry because it's also a top-level attribute supplied by callPackage
, argsOverride ? {}
, ...
} @ args:

# NOTE: bcachefs-tools should be updated simultaneously to preserve compatibility
(kernel.override ( args // {
  argsOverride = {
    version = "${kernel.version}-bcachefs-unstable-${date}";

    extraMeta = {
      branch = "master";
      maintainers = with lib.maintainers; [ davidak chiiruno ];
    };
  } // argsOverride;

  kernelPatches = [ {
      name = "bcachefs-${commit}";

      patch = fetchpatch {
        name = "bcachefs-${commit}.diff";
        url = "https://evilpiepirate.org/git/bcachefs.git/rawdiff/?id=${commit}&id2=v${lib.versions.majorMinor kernel.version}";
        sha256 = diffHash;
      };

      extraConfig = "BCACHEFS_FS m";
    } ] ++ kernelPatches;
}))