fix

setup.py

@@ -4,6 +4,7 @@ from setuptools import setup, find_packages
 import distutils
 from contextlib import redirect_stdout
 from importlib import import_module
+from warnings import warn
 
 import versioneer
 
@@ -79,6 +80,13 @@ def get_cmdclass():
 
 
 major_version = versioneer.get_version().split("+")[0]
+if major_version == "0":
+    warn("Lbmpy will be installed without VCS, thus it is impossible to determine its version. "
+         "This can lead to a faulty python requirements and thus a faulty environment")
+    pystencils_require = f'pystencils>=0.4.0'
+else:
+    pystencils_require = f'pystencils>=0.4.0,<={major_version}'
+
 setup(name='lbmpy',
       version=versioneer.get_version(),
       description='Code Generation for Lattice Boltzmann Methods',
@@ -89,7 +97,7 @@ setup(name='lbmpy',
       author_email='cs10-codegen@fau.de',
       url='https://i10git.cs.fau.de/pycodegen/lbmpy/',
       packages=['lbmpy'] + ['lbmpy.' + s for s in find_packages('lbmpy')],
-      install_requires=[f'pystencils>=0.4.0,<={major_version}', 'sympy>=1.5.1,<=1.11.1', 'numpy>=1.11.0'],
+      install_requires=[pystencils_require, 'sympy>=1.5.1,<=1.11.1', 'numpy>=1.11.0'],
       package_data={'lbmpy': ['phasefield/simplex_projection.pyx', 'phasefield/simplex_projection.c']},
       ext_modules=cython_extensions("lbmpy.phasefield.simplex_projection"),
       classifiers=[