Checking if your kit is complete... Looks good Writing Makefile for Math::GMP cp lib/Math/GMP.pm blib\lib\Math\GMP.pm AutoSplitting blib\lib\Math\GMP.pm (blib\lib\auto\Math\GMP) 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 -typemap typemap GMP.xs > GMP.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 GMP.xsc GMP.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=\"2.04\" -DXS_VERSION=\"2.04\" -ID:\cpanrun\build\5-6-1\lib\CORE GMP.c GMP.c GMP.xs(4) : fatal error C1083: Cannot open include file: 'gmp.h': No such file or directory