Installing custom RPM says "does not update installed package"

I've inherited some servers which have previously always had its software as custom compiled versions (apache, perl, mod_perl etc). I was thinking rather than compile every time, it may be better to put them into RPMs. I'm trying out some new ideas on Vagrant. This is also partly for a learning process. One of these is a custom Perl version 5.14.2, we have a compile script, which I have run on a fresh Vagrant box and uses 'checkinstall' to create an RPM. It all works fine when compiled, 2 versions of Perl on the same box (custom version goes into /opt/perl). However, I then have the perl RPM, if I take a fresh box and try and install via yum, I get... yum -y install /vagrant/perl-5.14.2-1.x86_64.rpm Examining /vagrant/perl-5.14.2-1.x86_64.rpm: perl-5.14.2-1.x86_64 /vagrant/perl-5.14.2-1.x86_64.rpm: does not update installed package. Which maybe makes sense, so I thought I would try rpm... rpm -ivh /vagrant/perl-5.14.2-1.x86_64.rpm perl(DBD::SQLite) is needed by perl-5.14.2-1.x86_64 perl(DBIx::Simple) is needed by perl-5.14.2-1.x86_64 perl(FCGI) is needed by perl-5.14.2-1.x86_64 perl(Mac::BuildTools) is needed by perl-5.14.2-1.x86_64 perl(Mac::InternetConfig) is needed by perl-5.14.2-1.x86_64 perl(Tk) is needed by perl-5.14.2-1.x86_64 perl(Tk::Pod) is needed by perl-5.14.2-1.x86_64 perl(Your::Module::Here) is needed by perl-5.14.2-1.x86_64 So there's a couple of questions. Is creating an RPM of custom compiled scripts the correct thing to do (assuming it needs to be compiled and not a distributions own version), and would I install this via rpm or via yum ? Why does the rpm -ivh say there are dependencies, when the orginal compile/checkinstall didn't shout about any and worked fine ? Edit: Here's an output of rpm -qi rpm -qi perl Name : perl Relocations: (not relocatable) Version : 5.10.1 Vendor: CentOS Release : 136.el6_6.1 Build Date: Wed 12 Nov 2014 09:22:55 UTC Install Date: Thu 14 May 2015 09:55:13 UTC Build Host: c6b8.bsys.dev.centos.org Group : Development/Languages Source RPM: perl-5.10.1-136.el6_6.1.src.rpm