Checking if your kit is complete... Looks good Writing Makefile for Win32::Process::Perf cp lib/Win32/Process/Perf/cs.dat blib\lib\Win32\Process\Perf\cs.dat cp lib/Win32/Process/Perf/en-gb.dat blib\lib\Win32\Process\PerPlease specify prototyping behavior for Perf.xs (see perlxs manual) NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop. n32\Process\Perf\en-us.dat cp lib/Win32/Process/Perf.pm blib\lib\Win32\Process\Perf.pm cp lib/Win32/Process/Perf/de-de.dat blib\lib\Win32\Process\Perf\de-de.dat cp lib/Win32/Process/Perf/de-at.dat blib\lib\Win32\Process\Perf\de-at.dat 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 Perf.xs > Perf.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 Perf.xsc Perf.c cl -c -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=\"1.05\" -DXS_VERSION=\"1.05\" -ID:\cpanrun\build\5-6-1\lib\CORE Perf.c Perf.c Perf.xs(39) : fatal error C1083: Cannot open include file: 'Sddl.h': No such file or directory