bokeh: Windows install fails 0.12.12

I’m getting an error installing bokeh 0.12.12. Previous versions install okay on my PC. I did a fresh install of Python 3.6.3 and deleted the pip cache directory first.

Windows 10 32-bit Python 3.6.3 32-bit

Running pip install yields:

> pip install bokeh==0.12.12
Collecting bokeh==0.12.12
  Using cached bokeh-0.12.12.tar.gz
Exception:
Traceback (most recent call last):
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\tarfile.py", line 2268, in utime
    os.utime(targetpath, (tarinfo.mtime, tarinfo.mtime))
OSError: [WinError 87] The parameter is incorrect

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\basecommand.py", line 215, in main
    status = self.run(options, args)
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\commands\install.py", line 324, in run
    requirement_set.prepare_files(finder)
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file
    session=self.session, hashes=hashes)
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\download.py", line 821, in unpack_url
    hashes=hashes
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\download.py", line 663, in unpack_http_url
    unpack_file(from_path, location, content_type, link)
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\utils\__init__.py", line 605, in unpack_file
    untar_file(filename, location)
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\site-packages\pip\utils\__init__.py", line 581, in untar_file
    tar.utime(member, path)
  File "k:\users\ed\appdata\local\programs\python\python36-32\lib\tarfile.py", line 2270, in utime
    raise ExtractError("could not change modification time")
tarfile.ExtractError: could not change modification time