when can i safely force a macports build when a dependency is indepently installed

[Carter Schonwald]

hello all,

I occasionally encounter errors of the following sort:

sudo port install erlang
--->  Activating fontconfig @2.6.0_2+macosx
Error: Target org.macports.activate returned: Image error:
/opt/local/etc/fonts/conf.avail/10-autohint.conf already exists and does not
belong to a registered port.  Unable to activate port fontconfig.
Error: The following dependencies failed to build: tk Xft2 fontconfig
xorg-libXScrnSaver xorg-scrnsaverproto
Error: Status 1 encountered during processing.


when / how can I safely force macports to install over the dependency or how
can i determine if its safe to do so?
thanks!
-Carter
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