graphviz opportunistically links to libANN

[barracuda156]

--->  Scanning binaries for linking errors
Could not open /opt/local/lib/libANN.dylib: Error opening or reading file (referenced from /opt/local/bin/mingle)
Could not open /opt/local/lib/libXv.1.dylib: Error opening or reading file (referenced from /opt/local/bin/ffmpeg)
--->  Found 12 broken files, matching files to ports     
--->  Found 2 broken ports, determining rebuild order
--->  Rebuilding in order
     graphviz @9.0.0_1+pangocairo+x11
     ffmpeg @4.4.5_0+gpl2

sergey-fedorovs-powerbook-g4-12:~ svacchanda$ port provides /opt/local/bin/mingle
/opt/local/bin/mingle is provided by: graphviz

ffmpeg issue I will handle, but I do not know whether graphviz rather should or should not link to libANN.