Checking if your kit is complete...
Looks good
Writing Makefile for SGI::syssgi
cp lib/SGI/syssgi.pm blib/lib/SGI/syssgi.pm
AutoSplitting blib/lib/SGI/syssgi.pm (blib/lib/auto/SGI/syssgi)
cc -c  -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE +DA1.1 +DS2.0a +z -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -Ae -O +Onolimit   -DVERSION=\"1.002\" -DXS_VERSION=\"1.002\" +z -I/home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1/PA-RISC1.1-thread-multi/CORE  syssgi.c
cpp: "syssgi.c", line 3: error 4036: Can't open include file 'sys/syssgi.h'.
make: *** [syssgi.o] Error 1