avrdude links with both MacPorts and system ncurses

[ryandesign@…]

avrdude 5.5 links with both the MacPorts ncurses and the OS ncurses:

$ otool -L /opt/local/bin/avrdude
/opt/local/bin/avrdude:
        /opt/local/lib/libusb-0.1.4.dylib (compatibility version 9.0.0, current version 9.4.0)
        /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 368.33.0)
        /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (compatibility version 1.0.0, current version 275.0.0)
        /opt/local/lib/libreadline.5.2.dylib (compatibility version 5.0.0, current version 5.2.0)
        /opt/local/lib/libncurses.5.dylib (compatibility version 5.0.0, current version 5.0.0)
        /usr/lib/libncurses.5.4.dylib (compatibility version 5.4.0, current version 5.4.0)
        /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 88.1.11)
$

It should only link against the MacPorts ncurses.