LICENSE should be a superset of LICENSE_<pkg> variables. That is, LICENSE_<pkg> shouldn't contain anything that is not specified in LICENSE. nettle_2.7.1.bb currently has: LICENSE = "LGPLv2.1 & GPLv2" LICENSE_${PN} = "LGPLv2.1+" The most obvious fix would be: -LICENSE = "LGPLv2.1 & GPLv2" +LICENSE = "LGPLv2.1+ & GPLv2" But I'm not sure if this is correct.
http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=7b33b23d0ee170ea0ff3a3b102b9fc1c3ef17cbe