Checking if your kit is complete...
Looks good
Writing Makefile for Net::NBsocket
cp NBsocket.pm blib\lib\Net\NBsocket.pm
AutoSplitting blib\lib\Net\NBsocket.pm (blib\lib\auto\Net\NBsocket)
 rights reserved.

'd:\cpanrun\build\5-6-1\bin' is not recognized as an internal or external command,
operable program or batch file.
NMAKE : fatal error U1077: 'd:\cpanrun\build\5-6-1\bin' : return code '0x1'
Stop.
	D:\cpanrun\build\5-6-1\bin\perl.exe -Mblib -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -e "use Test::Harness qw(&runUsing D:/cpanrun/depot/main/contrib-patched/perl/CPAN/src/Net-NBsocket/blib
Your vendor has not defined POSIX macro F_GETFL, used at blib\lib\Net\NBsocket.pm (autosplit into blib\dubious
	Test returned status 255 (wstat 6	Testing Internet Domain Sockets
Your vendor has not defined POSIX macro F_GETFL, used adubious
	Test returned status 255 (wstat 65280, 0xff00)
DIED. FAILED tests 2-19
	Failed 	Testing 127.0.0.1 Sockets
Your vendor hdubious
	Test returned status 255 (wstat 65280, 0xff00)
DIED. FAILED tests 2-19
	Failed 18/19 tests, 5.26% okay
t\tcpux_NB......dubious
	Test returned status 255 (wstat 65280, 0xff00)
DIED. FAILED tests 2-19
	Failed 18/19 tests, 5.26% okay
Failed Test    Stat Wstat ToFailed 4/6 test programs. 67/76 subtests failed.
NMAKE : fatal error U1077: 'D:\cpanrun\build\5-6-1\bin\perl.exe' : return code '0xff'
Stop.
 2-14
t\tcp_NB.t      255 65280    19   36  2-19
t\tcplh_NB.t    255 65280    19   36  2-19
t\tcpux_NB.t    255 65280    19   35  2-19
Failed 4/6 test scripts. 67/76 subtests failed.
Files=6, Tests=76, 17 wallclock secs ( 0.00 cusr +  0.00 csys =  0.00 CPU)