diff --git a/Library/Homebrew/requirements/python_dependency.rb b/Library/Homebrew/requirements/python_dependency.rb
index 246fbec2e780b40bece343a98042c92cd11652d0..4bdc9f614b094433a3127115553ea301052cc80e 100644
--- a/Library/Homebrew/requirements/python_dependency.rb
+++ b/Library/Homebrew/requirements/python_dependency.rb
@@ -5,6 +5,9 @@ class PythonDependency < Requirement
   default_formula "python"
 
   satisfy :build_env => false do
+    # Always build bottles against Homebrew Python as they still work
+    # against a 2.7 system Python.
+    next if ARGV.build_bottle?
     python = which_python
     next unless python
     version = python_short_version