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-rw-r--r--Library/Formula/mu.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/Library/Formula/mu.rb b/Library/Formula/mu.rb
index 1914cf1d6..6e57bde9c 100644
--- a/Library/Formula/mu.rb
+++ b/Library/Formula/mu.rb
@@ -38,7 +38,7 @@ class Mu < Formula
def install
# Explicitly tell the build not to include emacs support as the version
# shipped by default with Mac OS X is too old.
- ENV['EMACS'] = 'no' unless build.with? 'emacs'
+ ENV['EMACS'] = 'no' if build.without? 'emacs'
# I dunno.
# https://github.com/djcb/mu/issues/332