The rpm-3.0.5-0.5.src.rpm version produced a popt versioned:
       popt-1.5-0.5.i386.rpm
 
yet rpm-3.0.4-0.48.src.rpm produced a:
       popt-1.5-0.48
 
and so:
 
  #  rpm -Uvh rpm-3.0.5-0.5.i386.rpm rpm-devel-3.0.5-0.5.i386.rpm \
rpm-build-3.0.5-0.5.i386.rpm popt-1.5-0.5.i386.rpm
package popt-1.5-0.48 (which is newer than popt-1.5-0.5) is already
 install 
 
... this is probably not intended ---