From cd40af2c5842e83b8dde68dc16ef4e0985b51f52 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Thu, 2 May 2019 08:16:55 +0100
Subject: [PATCH] ARGV: fix build_head? call.

Fixes #6087.
---
 Library/Homebrew/extend/ARGV.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/extend/ARGV.rb b/Library/Homebrew/extend/ARGV.rb
index dfea80f2e8..1802991dfc 100644
--- a/Library/Homebrew/extend/ARGV.rb
+++ b/Library/Homebrew/extend/ARGV.rb
@@ -185,7 +185,7 @@ module HomebrewArgvExtension
   def collect_build_flags
     build_flags = []
 
-    build_flags << "--HEAD" if build_head?
+    build_flags << "--HEAD" if include?("--HEAD")
     build_flags << "--universal" if build_universal?
     build_flags << "--build-bottle" if build_bottle?
     build_flags << "--build-from-source" if build_from_source?