Install fails on py3.5
Installing on orange pi with error.
I can easily install everything else.

Everything is up-to date as it can be for this platform. 2GB of free space, 0% CPU load.
```
root@x:~# pip3 --version
spip 9.0.1 from /usr/lib/python3/dist-packages (python 3.5)
root@x:~# python3 --version
Python 3.5.3
```

Error:

```
pip3 install monero
Collecting monero
  Using cached https://files.pythonhosted.org/packages/2f/50/68bd75053eb6f9d88e83af5a4320e671fcd2105a4e89c660430dde011cb9/monero-0.8.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 157, in save_modules
        yield saved
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 255, in run_setup
        DirectorySandbox(setup_dir).run(runner)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 285, in run
        return func()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 253, in runner
        _execfile(setup_script, ns)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 47, in _execfile
        exec(code, globals, locals)
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/setup.py", line 52, in <module>
        'Operating System :: OS Independent',
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/setup.py", line 29, in scm_config

      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/src/setuptools_scm/__init__.py", line 15, in <module>
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/src/setuptools_scm/version.py", line 42
        trace(f"tag '{tag}' parsed to {result}")
                                              ^
    SyntaxError: invalid syntax

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 157, in save_modules
        yield saved
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 255, in run_setup
        DirectorySandbox(setup_dir).run(runner)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 285, in run
        return func()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 253, in runner
        _execfile(setup_script, ns)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 47, in _execfile
        exec(code, globals, locals)
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/setup.py", line 21, in <module>
        version_match = re.search(r"^__version__ = ['\"](.*)['\"]",
      File "/usr/lib/python3.5/distutils/core.py", line 108, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 317, in __init__
        self.fetch_build_eggs(attrs['setup_requires'])
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 372, in fetch_build_eggs
        replace_conflicting=True,
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 846, in resolve
        dist = best[req.key] = env.best_match(req, ws, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1118, in best_match
        return self.obtain(req, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1130, in obtain
        return installer(requirement)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 440, in fetch_build_egg
        return cmd.easy_install(req)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 699, in easy_install
        return self.install_item(spec, dist.location, tmpdir, deps)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 725, in install_item
        dists = self.install_eggs(spec, download, tmpdir)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 906, in install_eggs
        return self.build_and_install(setup_script, setup_base)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1145, in build_and_install
        self.run_setup(setup_script, setup_base, args)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1131, in run_setup
        run_setup(setup_script, args)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 258, in run_setup
        raise
      File "/usr/lib/python3.5/contextlib.py", line 77, in __exit__
        self.gen.throw(type, value, traceback)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3.5/contextlib.py", line 77, in __exit__
        self.gen.throw(type, value, traceback)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 169, in save_modules
        saved_exc.resume()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 144, in resume
        six.reraise(type, exc, self._tb)
      File "/usr/lib/python3/dist-packages/pkg_resources/_vendor/six.py", line 685, in reraise
        raise value.with_traceback(tb)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 157, in save_modules
        yield saved
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 255, in run_setup
        DirectorySandbox(setup_dir).run(runner)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 285, in run
        return func()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 253, in runner
        _execfile(setup_script, ns)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 47, in _execfile
        exec(code, globals, locals)
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/setup.py", line 52, in <module>
        'Operating System :: OS Independent',
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/setup.py", line 29, in scm_config

      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/src/setuptools_scm/__init__.py", line 15, in <module>
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/src/setuptools_scm/version.py", line 42
        trace(f"tag '{tag}' parsed to {result}")
                                              ^
    SyntaxError: invalid syntax

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-7v8w5om6/monero/setup.py", line 61, in <module>
        test_suite='tests',
      File "/usr/lib/python3.5/distutils/core.py", line 108, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 317, in __init__
        self.fetch_build_eggs(attrs['setup_requires'])
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 372, in fetch_build_eggs
        replace_conflicting=True,
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 846, in resolve
        dist = best[req.key] = env.best_match(req, ws, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1118, in best_match
        return self.obtain(req, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1130, in obtain
        return installer(requirement)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 440, in fetch_build_egg
        return cmd.easy_install(req)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 699, in easy_install
        return self.install_item(spec, dist.location, tmpdir, deps)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 725, in install_item
        dists = self.install_eggs(spec, download, tmpdir)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 906, in install_eggs
        return self.build_and_install(setup_script, setup_base)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1145, in build_and_install
        self.run_setup(setup_script, setup_base, args)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1131, in run_setup
        run_setup(setup_script, args)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 258, in run_setup
        raise
      File "/usr/lib/python3.5/contextlib.py", line 77, in __exit__
        self.gen.throw(type, value, traceback)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3.5/contextlib.py", line 77, in __exit__
        self.gen.throw(type, value, traceback)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 169, in save_modules
        saved_exc.resume()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 144, in resume
        six.reraise(type, exc, self._tb)
      File "/usr/lib/python3/dist-packages/pkg_resources/_vendor/six.py", line 685, in reraise
        raise value.with_traceback(tb)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 157, in save_modules
        yield saved
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 255, in run_setup
        DirectorySandbox(setup_dir).run(runner)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 285, in run
        return func()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 253, in runner
        _execfile(setup_script, ns)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 47, in _execfile
        exec(code, globals, locals)
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/setup.py", line 21, in <module>
        version_match = re.search(r"^__version__ = ['\"](.*)['\"]",
      File "/usr/lib/python3.5/distutils/core.py", line 108, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 317, in __init__
        self.fetch_build_eggs(attrs['setup_requires'])
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 372, in fetch_build_eggs
        replace_conflicting=True,
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 846, in resolve
        dist = best[req.key] = env.best_match(req, ws, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1118, in best_match
        return self.obtain(req, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1130, in obtain
        return installer(requirement)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 440, in fetch_build_egg
        return cmd.easy_install(req)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 699, in easy_install
        return self.install_item(spec, dist.location, tmpdir, deps)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 725, in install_item
        dists = self.install_eggs(spec, download, tmpdir)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 906, in install_eggs
        return self.build_and_install(setup_script, setup_base)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1145, in build_and_install
        self.run_setup(setup_script, setup_base, args)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1131, in run_setup
        run_setup(setup_script, args)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 258, in run_setup
        raise
      File "/usr/lib/python3.5/contextlib.py", line 77, in __exit__
        self.gen.throw(type, value, traceback)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3.5/contextlib.py", line 77, in __exit__
        self.gen.throw(type, value, traceback)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 169, in save_modules
        saved_exc.resume()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 144, in resume
        six.reraise(type, exc, self._tb)
      File "/usr/lib/python3/dist-packages/pkg_resources/_vendor/six.py", line 685, in reraise
        raise value.with_traceback(tb)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 157, in save_modules
        yield saved
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 198, in setup_context
        yield
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 255, in run_setup
        DirectorySandbox(setup_dir).run(runner)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 285, in run
        return func()
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 253, in runner
        _execfile(setup_script, ns)
      File "/usr/lib/python3/dist-packages/setuptools/sandbox.py", line 47, in _execfile
        exec(code, globals, locals)
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/setup.py", line 52, in <module>
        'Operating System :: OS Independent',
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/setup.py", line 29, in scm_config

      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/src/setuptools_scm/__init__.py", line 15, in <module>
      File "/tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/src/setuptools_scm/version.py", line 42
        trace(f"tag '{tag}' parsed to {result}")
                                              ^
    SyntaxError: invalid syntax
    /tmp/easy_install-7cc_7e05/pytest-runner-5.3.0/temp/easy_install-cawq09dz/setuptools_scm-6.0.1/src
    <pkg_resources.WorkingSet object at 0xb5cc6b30>

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-7v8w5om6/monero/

```