marto@pihost:~$ pwd
/home/marto
marto@pihost:~$ ls
drwxr-xr-x  9 marto marto      4096 Jul  6 13:17 ExtUtils-MakeMaker-7.30
drwxr-xr-x  9 marto marto      4096 Jul  6 13:41 local-lib-2.000023
......
marto@pihost:~$ eval `perl -I"/home/marto/local-lib-2.000023/lib" -Mlocal::lib`
marto@pihost:~$ cd ExtUtils-MakeMaker-7.30
marto@pihost:~$ perl Makefile.PL && make test && make install

.... this works without issue

marto@pihost:~$ cd ../local-lib-2.000023
marto@pihost:~$ perl Makefile.PL && make test && make install

.... again, this works without issue