old_contents: #!/usr/bin/env python
  # Copyright (c) Facebook, Inc. and its affiliates.
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  
  
  def fbcode_builder_spec(builder):
      return {
          'steps': [
              # on macOS the filesystem is typically case insensitive.
              # We need to ensure that the CWD is not the folly source
              # dir when we build, otherwise the system will decide
              # that `folly/String.h` is the file it wants when including
              # `string.h` and the build will fail.
              builder.github_project_workdir('facebook/folly', '_build'),
              builder.cmake_install('facebook/folly'),
          ],
      }
  
new_contents: #!/usr/bin/env python
  # Copyright (c) Facebook, Inc. and its affiliates.
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  
  
  def fbcode_builder_spec(builder):
      return {
          'steps': [
              # on macOS the filesystem is typically case insensitive.
              # We need to ensure that the CWD is not the folly source
              # dir when we build, otherwise the system will decide
              # that `folly/String.h` is the file it wants when including
              # `string.h` and the build will fail.
              builder.fb_github_project_workdir('folly/_build'),
              builder.cmake_install('facebook/folly'),
          ],
      }
  
subject: use fb_github_project_workdir() for folly