libz.so.6

Hello!

My system:
FreeBSD 10.0-RC2 #0 r259404: Sun Dec 15 08:18:20 UTC 2013     root_at_snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

I have a problem to install last.fm from FreeBSD 10.0-ALPHA:

/usr/local/bin/ld: ../build/last.fm/release/AbstractBootstrapper.o: undefined reference to symbol 'gzclose_at__at_ZLIB_1.2.4.0'
//lib/libz.so.6: error adding symbols: DSO missing from command line
collect2: ld returned 1 exit status
*** [../bin/last.fm] Error code 1

make[2]: stopped in /usr/ports/audio/last.fm/work/last.fm-1.5.4.26862/src
1 error

make[2]: stopped in /usr/ports/audio/last.fm/work/last.fm-1.5.4.26862/src
*** [sub-src-all-ordered] Error code 2

make[1]: stopped in /usr/ports/audio/last.fm/work/last.fm-1.5.4.26862
1 error

make[1]: stopped in /usr/ports/audio/last.fm/work/last.fm-1.5.4.26862
===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

Stop.
make: stopped in /usr/ports/audio/last.fm

===>>> make failed for audio/last.fm


What can I do in this case because as I am informed it is not a "problem" of maintainer but user.

Thank you.

-- 
Mitja
-------
http://www.redbubble.com/people/lumiwa