# 1. Starting with Debian packages for R 2.15.3 there is a build
    # dependency on 'libtiff5-dev' which is not in squeeze. Changing to
    # libtiff-dev, which is libtiff4-dev on squeeze.

    sed -i '/^Build-Depends/s/libtiff5-dev/libtiff-dev/' debian/control
    dch -a "debian/control: Change Build-Depends: from libtiff5-dev to libtiff-dev"

    # 2. Lower build dependencies for tcl 8.6 and tk 8.6 
    # which are not available in squeeze
    sed -i '/^Build-Depends/s/tcl8.6-dev/tcl8.5-dev/' debian/control
    sed -i '/^Build-Depends/s/tk8.6-dev/tk8.5-dev/' debian/control
    dch -a "debian/control: Change Build-Depends: from tcl8.6-dev to tcl8.5-dev"
    dch -a "debian/control: Change Build-Depends: from tk8.6-dev to tk8.5-dev"