unable to build pidgin after selfupdate

[sgaviria@…]

I updated macport (selfupdate) in order to grab higher version of pidgin, however building is broken:

$ sudo port install pidgin
....
---> Computing dependencies for pidgin
---> Building pidgin
Error: Target org.macports.build returned: shell command failed (see log for details) Error: Status 1 encountered during processing.

Here's what I see in the logs:

:info:build Making all in gestures
:info:build CCLD gestures.la
:info:build grep: /opt/local/lib/libpng12.la: No such file or directory
:info:build sed: /opt/local/lib/libpng12.la: No such file or directory
:info:build libtool: link: `/opt/local/lib/libpng12.la' is not a valid libtool archive
:info:build make[4]: * [gestures.la] Error 1
:info:build make[3]: * [all-recursive] Error 1
:info:build make[2]: * [all-recursive] Error 1
:info:build make[1]: * [all-recursive] Error 1
:info:build make: * [all] Error 2
:info:build shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_net_pidgin/work/pidgin-2.7.9" && /usr/bin/make -j2 all " returned error 2
:error:build Target org.macports.build returned: shell command failed (see log for details)
:debug:build Backtrace: shell command failed (see log for details)

while executing

"command_exec build"

(procedure "portbuild::build_main" line 8)
invoked from within

"$procedure $targetname"

Looks related to libpng version:

$ ls /opt/local/lib/libpng
libpng.a libpng.dylib libpng.la libpng14.14.dylib libpng14.a
libpng14.dylib libpng14.la