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-rw-r--r--Library/Homebrew/formula_installer.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index c8847eb08..21c3115d2 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -481,6 +481,13 @@ class FormulaInstaller
args << "--env=#{ARGV.env}" if ARGV.env
args << "--HEAD" if ARGV.build_head?
args << "--devel" if ARGV.build_devel?
+
+ f.build.each do |opt, _|
+ name = opt.name[/\A(.+)=\z$/, 1]
+ value = ARGV.value(name)
+ args << "--#{name}=#{value}" if name && value
+ end
+
args
end