Checking if your kit is complete... Looks good Note (probably harmless): No library found for -lgcrypt Writing Makefile for GCrypt cp GCrypt.pm blib/lib/GCrypt.pm AutoSplitting blib/lib/GCrypt.pm (blib/lib/auto/GCrypt) /home/cpanrun/build/5.6.1/bin/perl -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi -I/home/cpanrun/build/5.6.1/lib/5.6.1 /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp -typemap /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap -typemap typemap GCrypt.xs > GCrypt.xsc && mv GCrypt.xsc GCrypt.c Please specify prototyping behavior for GCrypt.xs (see perlxs manual) gcc -c -I. -DUSE_REENTRANT_API -D_GNU_SOURCE -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -DVERSION=\"0.3\" -DXS_VERSION=\"0.3\" -fpic -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi/CORE GCrypt.c GCrypt.xs:7: gcrypt.h: No such file or directory make: *** [GCrypt.o] Error 1