fix setuptools_scm usage related crash, fixes #423

setup.py

@@ -10,7 +10,9 @@ with open('README.rst') as f:
 
 setup(
     name='nsupdate',
-    use_scm_version=True,
+    use_scm_version={
+        'write_to': 'src/nsupdate/_version.py',
+    },
     url='http://github.com/nsupdate-info/nsupdate.info/',
     license='BSD',
     author='The nsupdate.info Team (see AUTHORS)',

src/nsupdate/__init__.py

@@ -4,7 +4,7 @@ nsupdate - dynamic DNS service
 
 import re
 
-from setuptools_scm import get_version
+from ._version import version
 
 
 class Version(tuple):  # pragma: no cover
@@ -62,6 +62,3 @@ class Version(tuple):  # pragma: no cover
         if self.additional != 'd0':
             version_str += self.additional
         return version_str
-
-
-version = get_version()