I would like to execute perl scripts with following modules:

use XML::LibXML;
use XML::LibXSLT;

Are those available somehow on n900?

Would any of those be in libxml-perl?
I tried to check libxml-perl, but it does not get installed. There are missing dependencies:

# apt-get install libxml-perl
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
libxml-perl: Depends: libxml-parser-perl but it is not installable
E: Broken packages

libxml-parser-perl has been mentioned to be missing, on the following page too:
http://talk.maemo.org/showthread.php?t=39937