anchor.diff:    sources = {
       "x86_64-linux" = {
         urls = urls' "x86_64-deb";
  -      md5Confirm = "39a4f6ef72c1ce94fec5ce112fd52d40";
  -      sha256 = "f20ce197b448cfad0275e1f7e18fa09b418804b0172d7698f843cb5382ac8dd5";
  +      md5Confirm = "5b8663ea0048add032cdb3ebc01b5ccc";
  +      sha256 = "f7f0cf1b333753ccc82f369f5dc5852b5d5e2d31a467d44f227efebdb35a3f3e";
       };
     };
   
  
positive.code: }:
  
  let
    version = "4.10.0-104";
  
    urls' = arch: [
      "http://www.mellanox.com/downloads/MFT/mft-${version}-${arch}.tgz"
  
negative.code: 
    preBuild = optionalString (kernel != null) ''
      ar vx SDEBS/*
      tar xf data.tar.*
  
      cd usr/src/*
  
  