Homebrew quits when trying to install graphviz,
CCLD libtcldot_builtin.la
ld: library not found for -ltclstub8.6
clang: error: linker command failed with e
The package seems to have moved recently:
brew install homebrew/dupes/tcl-tk
sudo ln -s /usr/local/Cellar/tcl-tk/8.6.0/lib/libtcl8.6.dylib /usr/local/lib/libtcl8.6.dylib
sudo ln -s /usr/local/Cellar/tcl-tk/8.6.0/lib/libtk8.6.dylib /usr/local/lib/libtk8.6.dylib
sudo ln -s /usr/lib/libtclstub8.5.a /usr/lib/libtclstub8.6.a
sudo ln -s /usr/lib/libtkstub8.5.a /usr/lib/libtkstub8.6.a
brew reinstall graphviz