While installing a Perl module in my home directory, I initially specified "--prefix", instead of "PREFIX", which of course tried to install things outside of the home directory. I tried that once more ending with the same problem. Error of my memory was corrected by reading one of INSTALL or README files.

Needless to say, that was result of being more in touch with configure scripts (as a user) than with module installations. Also, I should have read INSTALL & README even if I have installed Perl modules many times.