Checking if your kit is complete...
Looks good
Note (probably harmless): No library found for -lFLAC
Writing Makefile for Audio::FLAC::Decoder
cp Decoder.pm blib/lib/Audio/FLAC/Decoder.pm
/home/cpanrun/build/5.6.1/bin/perl -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi -I/home/cpanrun/build/5.6.1/lib/5.6.1 /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap -typemap typemap Decoder.xs > Decoder.xsc && mv Decoder.xsc Decoder.c
gcc -c  -DUSE_REENTRANT_API -D_GNU_SOURCE -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"0.2\" -DXS_VERSION=\"0.2\" -fpic -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi/CORE -O Decoder.c
Decoder.xs:38: FLAC/all.h: No such file or directory
In file included from Decoder.xs:40:
include/dither.h:21: FLAC/ordinals.h: No such file or directory
In file included from Decoder.xs:41:
include/replaygain_synthesis.h:20: FLAC/ordinals.h: No such file or directory
make: *** [Decoder.o] Error 1