cygport creates .gz packages, not .xz

[Andrew Schulman]

I'm running cygport 0.15.0-1 in x86_64.  I thought cygport was always
supposed to create .xz packages now, but for some reason for me it's
creating .gz packages.

I have the xz package installed, and /usr/bin/xz works.  My cygport file
is below.  What am I missing?

Thanks, Andrew.

NAME="socat"
VERSION=1.7.2.4
RELEASE=1
CATEGORY="Net"
SUMMARY="Bidirectional data transfer relay"
DESCRIPTION="socat is a relay for bidirectional data transfer between
two
independent data channels. Each channel may be a file, pipe, device
(serial line etc. or a pseudo terminal), a socket (UNIX, IP4, IP6 -
raw, UDP, TCP), an SSL socket, proxy CONNECT connection, a file
descriptor (stdin etc.), the GNU line editor (readline), a program,
or a combination of two of these. These modes include generation of
'listening' sockets, named pipes, and pseudo terminals."
HOMEPAGE="http://www.dest-unreach.org/socat/";
SRC_URI="http://www.dest-unreach.org/socat/download/socat-${VERSION}.tar.gz";
PATCH_URI="
    1.7_struct_pktinfo.patch
"

src_compile ()
{
    cd "${B}"
    cygconf
    cygmake
}

src_install ()
{
    dodir /usr/share/doc/${PN}

    cd "${B}"
    cyginstall

    cd "${D}"
    dosym ../Cygwin/${PN}.README /usr/share/doc/${PN}/README.Cygwin
}