build with yocto 1.6.1 on Ubuntu 12.04,
have add extra dep. to local.conf according to REAME
/poky/openembedded-core/meta \
/poky/meta-openembedded/meta-oe \
/poky/meta-openembedded/meta-perl \
/poky/meta-security \

but got following error message:

$ bitbake -k core-image-full-cmdline
ERROR: ExpansionError during parsing /poky/meta-openembedded/meta-perl/recipes-perl/libtest/libtest-harness-perl_3.30.bb <http://libtest-harness-perl_3.30.bb>: Failure expanding variable do_fetch[file-checksums], expression was ${@bb.fetch.get_checksum_file_list(d)} which triggered exception MalformedUrl: The URL: '${CPAN_MIRROR}/authors/id/L/LE/LEONT/Test-Harness-3.30.tar.gz' is invalid and cannot be interpreted

Summary: There was 1 ERROR message shown, returning a non-zero exit code.