Checking if your kit is complete... Looks good Writing Makefile for Goto::Cached cp lib/Goto/Cached.pm blib\lib\Goto\Cached.pm D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\buildCommand line error D2021 : invalid numeric argument '/Wall' NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop. ached.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 Cached.xsc Cached.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 -O3 -Wall -DVERSION=\"0.07\" -DXS_VERSION=\"0.07\" -ID:\cpanrun\build\5-6-1\lib\CORE Cached.c