"fdroid build --server" cannot find _fdroidserver_ files to copy into VM guest

The documentation suggests installing fdroidserver from a package repository. However, running the fdroid build commands from the package produces the following error:

$ fdroid build org.fdroid.fdroid -l --server
...
ERROR: Could not build app org.fdroid.fdroid due to unknown error: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/fdroidserver/build.py", line 1143, in main
    options.onserver, options.refresh):
  File "/usr/lib/python3/dist-packages/fdroidserver/build.py", line 933, in trybuild
    build_server(app, build, vcs, build_dir, output_dir, log_dir, force)
  File "/usr/lib/python3/dist-packages/fdroidserver/build.py", line 120, in build_server
    ftp.put(os.path.join(serverpath, '..', 'fdroid'), 'fdroid')
  File "/usr/lib/python3/dist-packages/paramiko/sftp_client.py", line 668, in put
    file_size = os.stat(localpath).st_size
FileNotFoundError: [Errno 2] No such file or directory: '/usr/lib/python3/dist-packages/fdroidserver/../fdroid'

I'm not an Python expert, but looking at line 120 in this case seems to reveal the relative path dependency:

117:serverpath = os.path.abspath(os.path.dirname(__file__))
...
120:ftp.put(os.path.join(serverpath, '..', 'fdroid'), 'fdroid')

A quick glance seems to suggest this issue is also present in master still.

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.3 LTS
Release:	16.04
Codename:	xenial

$ dpkg -l | grep fdroid
ii  fdroidserver                        0.8-1~xenial                               all          F-Droid build server and repository tools for Android