Checking if your kit is complete...
Looks good
Writing Makefile for IO::Epoll
cp lib/IO/Epoll.pm blib\lib\IO\Epoll.pm
AutoSplitting blib\lib\IO\Epoll.pm (blib\lib\auto\IO\Epoll)
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib D:\cpanrun\build\5-6-1\lib\ExtUtils/xsubpp  -typemap D:\cpanrun\build\5-6-1\lib\ExtUtils\typemap Epoll.xs > Epoll.xsc && D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e mv Epoll.xsc Epoll.c
	cl -c -I. -nologo -O1 -MD -Zi -DNDEBUG -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DPERL_MSVCRT_READFIX -O1 -MD -Zi -DNDEBUG    -DVERSION=\"0.01\"  -DXS_VERSION=\"0.01\"  -ID:\cpanrun\build\5-6-1\lib\CORE  Epoll.c
Epoll.c
Epoll.xs(7) : fatal error C1083: Cannot open include file: 'sys/epoll.h': No such file or directory