Calibre binary install on Ubuntu 12.04 without root rights

Hello there,

I'm trying to install the 0.8.60 version of Calibre as a regular user on Linux, i. e. into my home directory, with:

python -c "import sys; py3 = sys.version_info[0] > 2; u = __import__('urllib.request' if py3 else 'urllib', fromlist=1); exec(u.urlopen('http://status.calibre-ebook.com/linux_installer').read()); main(install_dir='/home/dirk/')"

However the installer insists on writing to /opt

So, how can I install calibre without root rights?

-- Dirk