anchor.diff:  let
     buildKernel = any (n: n == configFile) [ "kernel" "all" ];
     buildUser = any (n: n == configFile) [ "user" "all" ];
  -
  -  # remove this patch at the next ZFS release (> 2.0.1)
  -  reapplyPathSanitizerPatch = fetchpatch {
  -    url = "https://github.com/openzfs/zfs/commit/03f036cbccdd8699f5fe8540ef317595a35bceb8.patch";
  -    sha256 = "c157bbb6551a4e720c3faba005e1b72e4692d304c6ff5e0e685691bd47197dca";
  -  };
   
     common = { version
       , sha256
  
positive.code: { lib, stdenv, fetchFromGitHub, fetchpatch
  , autoreconfHook269, util-linux, nukeReferences, coreutils
  , perl, buildPackages
  , configFile ? "all"
  
negative.code:     # incompatibleKernelVersion = "4.20";
  
      # this package should point to the latest release.
      version = "2.0.2";
  
      sha256 = "sha256-KzrRQwfQRvIQkHG5mj6cGBdcv2VEhC5y7bi09DaKqhY=";
    };
  
    zfsUnstable = common {
  