when I run this command

rpmbuild --nodeps --rebuild hadoop-2.6.0+cdh5.5.1+924-1.cdh5.5.1.p0.15.src.rpm

get error info

++ echo 'Variable PACK_ENG_COMMON undefined - this needs to point to the directory ec2_build/bin/pack-eng-common in the cdh4 branch of cdh'
Variable PACK_ENG_COMMON undefined - this needs to point to the directory ec2_build/bin/pack-eng-common in the cdh4 branch of cdh
++ exit 1
error: Bad exit status from /var/tmp/rpm-tmp.2fiimu (%install)

RPM build errors:
InstallSourcePackage at: psm.c:244: Header V4 DSA/SHA1 Signature, key ID e8f86acd: NOKEY
Bad exit status from /var/tmp/rpm-tmp.2fiimu (%install)