We are setting up a clone of wireshark project for a specific change. We are modifying wireshark source code. We intend to maintain this wireshark source repository internal to organization. We intend to distribute the modified wireshark source code with wireshark software to our end customer as per GPLv2.
Wireshark recommends ActivePerl to be used as development tools for building wireshark. Now, in this particular case where we are maintaining custom wireshark source code internally (but following GPLv2 license), are we allowed to use ActivePerl as development tool for free?