/home/me/projects
/home/me/projects/project1
/home/me/projects/project2

##</code><code>##

sh Configure -de -Dprefix=/home/me/projects/project1/perl
make
make install

##</code><code>##

$ cat /home/me/projects/project1/bin/environment
#!/bin/bash
export PATH="/home/me/projects/project1/perl/bin:$PATH"

$ chmod 775 /home/me/projects/project1/bin/environment

##</code><code>##

$ which perl
/usr/bin/perl

$ . bin/environment

$ which perl
/home/me/projects/project1/perl/bin/perl