fix multibuilds on windows

setup.cfg

@@ -2,7 +2,7 @@
 [metadata]
 name = snakehouse
 keywords = cython, extension, multiple, pyx
-version = 1.7a1
+version = 1.7
 long-description = file: README.md
 long-description-content-type = text/markdown; charset=UTF-8
 license_files = LICENSE

snakehouse/__init__.py

@@ -7,4 +7,4 @@ from .requirements import read_requirements_txt, find_c, find_pyx_and_c, find_py
 try:
     __version__ = pkg_resources.require('snakehouse')[0].version
 except pkg_resources.DistributionNotFound:
-    __version__ = '1.7a1'
+    __version__ = '1.7'

snakehouse/faster_builds.py

 import multiprocessing
 import typing as tp
+import sys
 
 __all__ = ['monkey_patch_parallel_compilation']
 
@@ -13,6 +14,10 @@ def monkey_patch_parallel_compilation(cores: tp.Optional[int] = None) -> None:
 
     :param cores: amount of cores. Leave at default (None) for autodetection.
     """
+    if sys.platform == 'win32':
+        print('Sorry, parallel builds are not supported on Windows')
+        return
+
     if cores is None:
         cores = multiprocessing.cpu_count()