anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "samba";
  -  version = "4.12.2";
  +  version = "4.12.3";
   
     src = fetchurl {
       url = "mirror://samba/pub/samba/stable/${pname}-${version}.tar.gz";
  -    sha256 = "0l514s2xhsy1lspzgvibbzs80zi84zxr2wx4d40hq85yb2lg5434";
  +    sha256 = "09w7aap1cjc41ayhaksm1igc7p7gl40fad4a1l6q4ds9a2jbrb9z";
     };
   
     outputs = [ "out" "dev" "man" ];
  
positive.code:     find $out -type f -name \*.so -exec $SHELL -c "$SCRIPT" \;
    '';
  
    meta = with stdenv.lib; {
      homepage = "https://www.samba.org";
      description = "The standard Windows interoperability suite of programs for Linux and Unix";
  
negative.code: , libtasn1
  , tdb
  , cmocka
  , nixosTests
  
  , enableLDAP ? false, openldap
  , enablePrinting ? false, cups
  