Software :: Mockbuild Does Not Exist - Installing Rpm Package

I am following this instructions:

Code:

[URL]

I have downloaded the following kernel:

kernel-2.6.18-164.15.1.el5.src.rpm

I have done the following steps:

As root, install the packages rpm-build, redhat-rpm-config and unifdef:

Code:

[root@host]# yum install rpm-build redhat-rpm-config unifdef

As an ordinary user, not root, create a directory tree based on ~/rpmbuild:

Code:

[user@host]$ cd
[user@host]$ mkdir -p rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
[user@host]$ echo '%_topdir %(echo $HOME)/rpmbuild' > .rpmmacros

However, when I try and install the rpm package:

Code:

[user@host]$ rpm -ivh kernel-2.6.18-164.15.1.el5.src.rpm | 2>&1 | grep -v mockb

I get the following error:

Code:

warning: user mockbuild does not exist - using root
warning: group mockbuild does not exist - using root