Checking if your kit is complete... Looks good Writing Makefile for List::MoreUtils Testing if you have a C compiler Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. 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=\"0.21\" -DXS_VERSION=\"0.21\" "-IC:\cpanrun\build\5-10-0\lib\CORE" -DPERL_EXT test.c test.c Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. cp lib/List/MoreUtils.pm blib\lib\List\MoreUtils.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 MoreUtils.xs > MoreUtils.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv MoreUtils.xsc MoreUtils.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=\"0.21\" -DXS_VERSION=\"0.21\" "-IC:\cpanrun\build\5-10-0\lib\CORE" -DPERL_EXT MoreUtils.c MoreUtils.c MoreUtils.xs(1002) : warning C4101: 'oldsp' : unreferenced local variable MoreUtils.xs(1267) : warning C4101: 'j' : unreferenced local variable MoreUtils.xs(1434) : error C2059: syntax error : ')' NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.