Checking if your kit is complete...
Looks good
Writing Makefile for Audio::Mixer
cp Mixer.pm blib/lib/Audio/Mixer.pm
AutoSplitting blib/lib/Audio/Mixer.pm (blib/lib/auto/Audio/Mixer)
cp volume.pl blib/lib/Audio/volume.pl
gcc -c   -D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DPRIVLIB_LAST_IN_INC -fno-strict-aliasing -pipe -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -O2   -DVERSION=\"0.7\" -DXS_VERSION=\"0.7\" -fPIC "-I/home/cpanrun/build/5.10.0/lib/CORE"   Mix.c
/home/cpanrun/tmp/5.10.0/bin/perl /home/cpanrun/build/5.10.0/lib/ExtUtils/xsubpp  -typemap /home/cpanrun/build/5.10.0/lib/ExtUtils/typemap  Mixer.xs > Mixer.xsc && mv Mixer.xsc Mixer.c
Please specify prototyping behavior for Mixer.xs (see perlxs manual)
gcc -c   -D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DPRIVLIB_LAST_IN_INC -fno-strict-aliasing -pipe -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -O2   -DVERSION=\"0.7\" -DXS_VERSION=\"0.7\" -fPIC "-I/home/cpanrun/build/5.10.0/lib/CORE"   Mixer.c
Running Mkbootstrap for Audio::Mixer ()
chmod 644 Mixer.bs
rm -f blib/arch/auto/Audio/Mixer/Mixer.so
gcc  -shared -O2 Mixer.o  -o blib/arch/auto/Audio/Mixer/Mixer.so Mix.o	\
     	\
  
chmod 755 blib/arch/auto/Audio/Mixer/Mixer.so
cp Mixer.bs blib/arch/auto/Audio/Mixer/Mixer.bs
chmod 644 blib/arch/auto/Audio/Mixer/Mixer.bs
Manifying blib/man3/Audio::Mixer.3
PERL_DL_NONLAZY=1 /home/cpanrun/tmp/5.10.0/bin/perl "-Iblib/lib" "-Iblib/arch" test.pl
1..1
ok 1
Opening mixer...  Error opening /dev/mixer.FAILED.
Getting the volume... Error opening /dev/mixer.255, 255 Ok.
Setting to 50... Error opening /dev/mixer.Error opening /dev/mixer.FAILED.
Trying to reset back... Error opening /dev/mixer.Error opening /dev/mixer.Ok.
Files found in blib/arch: installing files in blib/lib into architecture dependent library tree
Installing /home/cpanrun/build/5.10.0/site/lib/auto/Audio/Mixer/Mixer.so
Installing /home/cpanrun/build/5.10.0/site/lib/auto/Audio/Mixer/Mixer.bs
Installing /home/cpanrun/build/5.10.0/html/site/lib/Audio/Mixer.html
Installing /home/cpanrun/build/5.10.0/site/lib/Audio/Mixer.pm
Installing /home/cpanrun/build/5.10.0/site/lib/Audio/volume.pl
Installing /home/cpanrun/build/5.10.0/site/lib/auto/Audio/Mixer/autosplit.ix
Installing /home/cpanrun/build/5.10.0/site/man/man3/Audio::Mixer.3
Appending installation info to /home/cpanrun/build/5.10.0/lib/perllocal.pod