--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,4 @@
+import os
 from setuptools import setup, find_packages


@@ -6,8 +7,7 @@ def main():
         name='py',
         description='library with cross-python path, ini-parsing, io, code, log facilities',
         long_description=open('README.rst').read(),
-        use_scm_version={"write_to": "py/_version.py"},
-        setup_requires=["setuptools-scm"],
+        version=os.getenv('PKG_VERSION'),
         url='http://py.readthedocs.io/',
         license='MIT license',
         platforms=['unix', 'linux', 'osx', 'cygwin', 'win32'],