Checking if your kit is complete... Looks good Writing Makefile for Lchown Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. cp Lchown.pm blib\lib\Lchown.pm 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 Lchown.xs > Lchown.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv Lchown.xsc Lchown.c cl -c -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=\"1.00\" -DXS_VERSION=\"1.00\" "-IC:\cpanrun\build\5-10-0\lib\CORE" Lchown.c Lchown.c Lchown.xs(28) : error C2065: 'sv_undef' : undeclared identifier Lchown.xs(28) : warning C4133: '=' : incompatible types - from 'int *' to 'struct sv *' NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.