Checking if your kit is complete... Looks good Writing Makefile for Chipcard::PCSC::Card Writing Makefile for Chipcard::PCSC Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. Math::BigInt: couldn't load specified math lib(s), fallback to Math::BigInt::FastCalc at C:/cpanrun/build/5-10-0/site/lib/Win32API/File.pm line 20 cp PCSC.pod blib\lib\Chipcard\PCSC.pod cp PCSC.pm blib\lib\Chipcard\PCSC.pm nmake -f Makefile all -nologo Math::BigInt: couldn't load specified math lib(s), fallback to Math::BigInt::FastCalc at C:/cpanrun/build/5-10-0/site/lib/Win32API/File.pm line 20 cp Card.pod ..\blib\lib\Chipcard\PCSC\Card.pod cp Card.pm ..\blib\lib\Chipcard\PCSC\Card.pm cd .. C:\cpanrun\build\5-10-0\bin\perl.exe C:\cpanrun\build\5-10-0\lib\ExtUtils\xsubpp -typemap C:\cpanrun\build\5-10-0\lib\ExtUtils\typemap -typemap typemap PCSC.xs > PCSC.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv PCSC.xsc PCSC.c cl -c `pkg-config --cflags libpcsclite` -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=\"0.04\" -DXS_VERSION=\"0.04\" "-IC:\cpanrun\build\5-10-0\lib\CORE" -O2 -Wall PCSC.c Command line warning D4025 : overriding '/O1' with '/O2' Command line error D2021 : invalid numeric argument '/Wall' NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.