Homebrew/homebrew — pull request #25689 by gbeine (2014-01-06 19:40:17+00:00)
Title: Fixed graphicsmagic when installing using --with-perl

The following error is fixed by this commit.
==> perl Makefile.PL PREFIX=/opt/homebrew/Cellar/graphicsmagick/1.3.19
Only one of PREFIX or INSTALL_BASE can be given. Not both.
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