You can save the effort, apt-src do exactly this for you. In fact perl is installed at the same time that Ubuntu

After the README.gz file you can positively run configure with extra options (i.e:  ./Configure -des -Dprefix=$HOME/localperl)

"If you run into any trouble whatsoever or you need to install a 
customized version of Perl, you should read the detailed instructions 
in the "INSTALL" file that came with this distribution."
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