diff --git a/Library/Homebrew/language/python.rb b/Library/Homebrew/language/python.rb
index 1f6c76c187..cd509d83ae 100644
--- a/Library/Homebrew/language/python.rb
+++ b/Library/Homebrew/language/python.rb
@@ -115,7 +115,7 @@ module Language
         python_path = if use_python_from_path
           "/usr/bin/env python3"
         else
-          python_deps = formula.deps.map(&:name).grep(/^python(@.*)?$/)
+          python_deps = formula.deps.map(&:name).grep(/^python(@.+)?$/)
           raise ShebangDetectionError.new("Python", "formula does not depend on Python") if python_deps.empty?
           if python_deps.length > 1
             raise ShebangDetectionError.new("Python", "formula has multiple Python dependencies")