MPD will not compile.

To reproduce:

cp -r /var/abs/extra/mpd ~/builds
cd ~/builds/mpd
mkpkg -s

Result:
src/decoder/src_mpd-mpcdec_decoder_plugin.o: In function `mpcdec_get_file_duration':
mpcdec_decoder_plugin.c:(.text+0x93): undefined reference to `mpc_demux_init'
mpcdec_decoder_plugin.c:(.text+0xb0): undefined reference to `mpc_demux_get_info'
mpcdec_decoder_plugin.c:(.text+0xb8): undefined reference to `mpc_demux_exit'
src/decoder/src_mpd-mpcdec_decoder_plugin.o: In function `mpcdec_decode':
mpcdec_decoder_plugin.c:(.text+0x1f9): undefined reference to `mpc_demux_init'
mpcdec_decoder_plugin.c:(.text+0x215): undefined reference to `mpc_demux_get_info'
mpcdec_decoder_plugin.c:(.text+0x3ef): undefined reference to `mpc_demux_decode'
mpcdec_decoder_plugin.c:(.text+0x4bb): undefined reference to `mpc_demux_seek_sample'
mpcdec_decoder_plugin.c:(.text+0x4f6): undefined reference to `mpc_demux_exit'
mpcdec_decoder_plugin.c:(.text+0x56a): undefined reference to `mpc_demux_exit'
collect2: ld returned 1 exit status
make[1]: *** [src/mpd] Error 1
make[1]: Leaving directory `/home/matthew/builds/mpd/src/mpd-0.16.5'
make: *** [all] Error 2
==> ERROR: A failure occurred in build().
Aborting...