Installing GWT 2.5.1 through Eclipse

I'm trying to install GWT plugin for Eclipse. I go to 'Help > Install new software... ' through menus and I have added http://dl.google.com/eclipse/plugin/4.2 as Available Software Site. I choose to install Google Web Toolkit SDK 2.5.1, accept the agreements. Installing software dialog window appears and I see the progress bar which immediately gets stuck at 48% and never proceeds from there.

System information:

Arch Linux 3.8.10-1 x86_64

Eclipse SDK 4.2.2

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