old_contents: import os
  
  
  # Prevent invalid shebangs with Homebrew-installed Python:
  # https://bugs.python.org/issue22490
  os.environ.pop('__PYVENV_LAUNCHER__', None)
  
  
  # Shell compatibility mode, for mis-configured shells.
  PIPENV_SHELL_COMPAT = os.environ.get('PIPENV_SHELL_COMPAT')
  
  # Create the virtualenv in the project, isntead of with pew.
  PIPENV_VENV_IN_PROJECT = os.environ.get('PIPENV_VENV_IN_PROJECT')
  
  # No color mode, for unfun people.
  PIPENV_COLORBLIND = os.environ.get('PIPENV_COLORBLIND')
  
  # Disable spinner for better test and deploy logs (for the unworthy).
  PIPENV_NOSPIN = os.environ.get('PIPENV_NOSPIN')
  
  # User-configuraable max-depth for Pipfile searching.
  # Note: +1 because of a temporary bug in Pipenv.
  PIPENV_MAX_DEPTH = int(os.environ.get('PIPENV_MAX_DEPTH', '3')) + 1
  
  # Tells Pipenv to use the virtualenv-provided pip instead.
  PIPENV_USE_SYSTEM = os.environ.get('VIRTUAL_ENV') if 'PIPENV_IGNORE_VIRTUALENVS' not in os.environ else False
  
  # Tells Pipenv to use hashing mode.
  PIPENV_USE_HASHES = True
  
  # Tells pipenv to skip case-checking (slow internet connections).
  PIPENV_SKIP_VALIDATION = True
  
  # Use shell compatibility mode when using venv in project mode.
  if PIPENV_VENV_IN_PROJECT:
      PIPENV_SHELL_COMPAT = True
  
  # Disable spinner on windows.
  if os.name == 'nt':
      PIPENV_NOSPIN = True
  
  if 'CI' in os.environ:
      PIPENV_NOSPIN = True
  
  PIPENV_HIDE_EMOJIS = os.environ.get('PIPENV_HIDE_EMOJIS')
  if os.name == 'nt':
      PIPENV_HIDE_EMOJIS = True
  
  # Tells pipenv how long to wait for virtualenvs to be created in seconds
  PIPENV_TIMEOUT = int(os.environ.get('PIPENV_TIMEOUT', 120))
  
  PIPENV_INSTALL_TIMEOUT = 60 * 15
  
  PYENV_INSTALLED = os.environ.get('PYENV_ROOT')
new_contents: import os
  
  
  # Prevent invalid shebangs with Homebrew-installed Python:
  # https://bugs.python.org/issue22490
  os.environ.pop('__PYVENV_LAUNCHER__', None)
  
  
  # Shell compatibility mode, for mis-configured shells.
  PIPENV_SHELL_COMPAT = os.environ.get('PIPENV_SHELL_COMPAT')
  
  # Create the virtualenv in the project, isntead of with pew.
  PIPENV_VENV_IN_PROJECT = os.environ.get('PIPENV_VENV_IN_PROJECT')
  
  # No color mode, for unfun people.
  PIPENV_COLORBLIND = os.environ.get('PIPENV_COLORBLIND')
  
  # Disable spinner for better test and deploy logs (for the unworthy).
  PIPENV_NOSPIN = os.environ.get('PIPENV_NOSPIN')
  
  # User-configuraable max-depth for Pipfile searching.
  # Note: +1 because of a temporary bug in Pipenv.
  PIPENV_MAX_DEPTH = int(os.environ.get('PIPENV_MAX_DEPTH', '3')) + 1
  
  # Tells Pipenv to use the virtualenv-provided pip instead.
  PIPENV_USE_SYSTEM = os.environ.get('VIRTUAL_ENV') if 'PIPENV_IGNORE_VIRTUALENVS' not in os.environ else False
  
  # Tells Pipenv to use hashing mode.
  PIPENV_USE_HASHES = True
  
  # Tells pipenv to skip case-checking (slow internet connections).
  PIPENV_SKIP_VALIDATION = True
  
  # Use shell compatibility mode when using venv in project mode.
  if PIPENV_VENV_IN_PROJECT:
      PIPENV_SHELL_COMPAT = True
  
  # Disable spinner on windows.
  if os.name == 'nt':
      PIPENV_NOSPIN = True
  
  if 'CI' in os.environ:
      PIPENV_NOSPIN = True
  
  PIPENV_HIDE_EMOJIS = os.environ.get('PIPENV_HIDE_EMOJIS')
  if os.name == 'nt':
      PIPENV_HIDE_EMOJIS = True
  
  # Tells pipenv how long to wait for virtualenvs to be created in seconds
  PIPENV_TIMEOUT = int(os.environ.get('PIPENV_TIMEOUT', 120))
  
  PIPENV_INSTALL_TIMEOUT = 60 * 15
  
  PYENV_INSTALLED = bool(os.environ.get('PYENV_SHELL'))
  
subject: Improve pyenv detection