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-rwxr-xr-xLibrary/brew.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/Library/brew.rb b/Library/brew.rb
index ea46c9b07..e532ca829 100755
--- a/Library/brew.rb
+++ b/Library/brew.rb
@@ -3,7 +3,8 @@
std_trap = trap("INT") { exit! 130 } # no backtrace thanks
-HOMEBREW_BREW_FILE = ENV['HOMEBREW_BREW_FILE'] = File.expand_path(__FILE__)
+HOMEBREW_BREW_FILE = ENV['HOMEBREW_BREW_FILE']
+HOMEBREW_BREW_FILE = ENV['HOMEBREW_BREW_FILE'] ||= File.expand_path(__FILE__)
if ARGV == %w{--prefix}
puts File.dirname(File.dirname(HOMEBREW_BREW_FILE))