anchor.diff:      maintainers = with maintainers; [ raskin wkennington ];
       platforms = platforms.linux;
     };
  -} // (if stdenv.isArm then {
  -  # gcc bug with -O1 on ARM
  -  patchPhase = "sed -i s/-O1/-O2/ configure";
  -} else {}))
  +}
  
positive.code:     asciidoc xmlto docbook_xml_dtd_45 docbook_xsl libxslt
    ];
  
    # for btrfs to get the rpath to libgcc_s, needed for pthread_cancel to work
    NIX_CFLAGS_LINK = "-lgcc_s";
  
    makeFlags = "prefix=$(out)";
  
    meta = with stdenv.lib; {
      description = "Utilities for the btrfs filesystem";
  
negative.code: { stdenv, fetchurl, pkgconfig, attr, acl, zlib, libuuid, e2fsprogs, lzo
  , asciidoc, xmlto, docbook_xml_dtd_45, docbook_xsl, libxslt
  }:
  
  let version = "4.1.1"; in
  
  stdenv.mkDerivation rec {
    name = "btrfs-progs-${version}";
  
    src = fetchurl {
  