anchor.diff:  { stdenv, fetchurl }:
   
  -let version = "2015c"; in
  +let version = "2015c";
   
  -stdenv.mkDerivation rec {
  +self = stdenv.mkDerivation rec {
     name = "tzdata-${version}";
   
     srcs =
  
positive.code:     ];
  
    sourceRoot = ".";
    outputs = [ "out" "lib" ];
  
    makeFlags = "TOPDIR=$(out) TZDIR=$(out)/share/zoneinfo ETCDIR=$(TMPDIR)/etc LIBDIR=$(lib)/lib MANDIR=$(TMPDIR)/man AWK=awk CFLAGS=-DHAVE_LINK=0";
  
    postInstall =
      ''
  
negative.code:     platforms = stdenv.lib.platforms.all;
    };
  }
  
  ;in self // { lib = self; }
  
  