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Writing Makefile for Games::Go::GMP

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

cp GMP.pm blib\lib\Games\Go\GMP.pm
AutoSplitting blib\lib\Games\Go\GMP.pm (blib\lib\auto\Games\Go\GMP)
	cl -c    -nologo -GF -W3 -MD -Zi -DNDEBUG -O1 -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DUSE_SITECUSTOMIZE -DPRIVLIB_LAST_IN_INC -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO -DPERL_MSVCRT_READFIX -MD -Zi -DNDEBUG -O1    -DVERSION=\"0.01\"  -DXS_VERSION=\"0.01\"  "-IC:\cpanrun\build\5-10-0\lib\CORE"  -I. gmp.c
gmp.c
gmp.c(18) : fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.