Ошибка qmake при компиляции Bitcoin из исходников

При компиляции Bitcoin из исходников вылазит такое вот сообщение:

root@crazyhome:/home/vld64/MY/bitcoin/bitcoin-0.8.6-linux/src# qmake

Project MESSAGE: Building with UPNP support
Removed plural forms as the target language has less forms.
If this sounds wrong, possibly the target language is not set or recognized.
Removed plural forms as the target language has less forms.
If this sounds wrong, possibly the target language is not set or recognized.
Removed plural forms as the target language has less forms.
If this sounds wrong, possibly the target language is not set or recognized.
Removed plural forms as the target language has less forms.
If this sounds wrong, possibly the target language is not set or recognized.

Что может быть причиной этой ошибки?

Операционная система Debian 7 wheezy 32-битная.
Версия qmake:

$ qmake --version

QMake version 2.01a
Using Qt version 4.8.2 in /usr/lib/i386-linux-gnu

http://packages.debian.org/source/sid/bitcoin