Checking if your kit is complete... Looks good Note (probably harmless): No library found for -lgcrypt Writing Makefile for GCrypt Microsoft (R) Program Maintenance Utility Version 6.00.8168.0 Copyright (C) Microsoft Corp 1988-1998. All rights reserved. Math::BigInt: couldn't load specified math lib(s), fallback to Math::BigInt::FastCalc at C:/cpanrun/build/5-10-0/site/lib/Win32API/File.pm line 20 cp GCrypt.pm blib\lib\GCrypt.pm AutoSplitting blib\lib\GCrypt.pm (blib\lib\auto\GCrypt) 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 -typemap typemap GCrypt.xs > GCrypt.xsc && C:\cpanrun\build\5-10-0\bin\perl.exe -MExtUtils::Command -e mv GCrypt.xsc GCrypt.c Please specify prototyping behavior for GCrypt.xs (see perlxs manual) cl -c -I. -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=\"0.3\" -DXS_VERSION=\"0.3\" "-IC:\cpanrun\build\5-10-0\lib\CORE" GCrypt.c GCrypt.c GCrypt.xs(7) : fatal error C1083: Cannot open include file: 'gcrypt.h': No such file or directory NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop.