Constantly reinstalling fontconfig

[dpo]

When opening an issue, please ping @staticfloat.

Building anything that depends on Homebrew.jl produces this:

INFO: Building Homebrew
Already up-to-date.
Uninstalling fontconfig... (493 files, 3.2MB)
==> Installing fontconfig from staticfloat/juliatranslated
==> Downloading https://homebrew.bintray.com/bottles/fontconfig-2.12.6.high_sier
Already downloaded: /Users/dpo/Library/Caches/Homebrew.jl/fontconfig-2.12.6.high_sierra.bottle.tar.gz
==> Pouring fontconfig-2.12.6.high_sierra.bottle.tar.gz
==> Regenerating font cache, this may take a while
==> /Users/dpo/.julia/v0.6/Homebrew/deps/usr/Cellar/fontconfig/2.12.6/bin/fc-cac
🍺  /Users/dpo/.julia/v0.6/Homebrew/deps/usr/Cellar/fontconfig/2.12.6: 493 files, 3.2MB
Warning: Already linked: /Users/dpo/.julia/v0.6/Homebrew/deps/usr/Cellar/fontconfig/2.12.6

Building again uninstalls fontconfig, then installs it again. Why???