Checking if your kit is complete...
Looks good
Writing Makefile for HPUX::Pstat
cp example2.pl blib/lib/HPUX/example2.pl
cp Pstat.pm blib/lib/HPUX/Pstat.pm
cp example1.pl blib/lib/HPUX/example1.pl
/export/home/cpanrun/build/5.6.1/bin/perl -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp -noprototypes -typemap /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap -typemap typemap Pstat.xs > Pstat.xsc && mv Pstat.xsc Pstat.c
gcc -c  -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"1.01\" -DXS_VERSION=\"1.01\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE  Pstat.c
In file included from Pstat.xs:7:
pack.h:11: sys/pstat.h: No such file or directory
make: *** [Pstat.o] Error 1