Author: Michael R. Crusoe <crusoe@debian.org>
Description: Rerun Cython to support Python 3.10+
Forwarded: not-needed
--- khmer.orig/setup.py
+++ khmer/setup.py
@@ -62,9 +62,12 @@
 
 CMDCLASS = versioneer.get_cmdclass()
 
-from setuptools import Extension as CyExtension
-HAS_CYTHON = False
-cy_ext = 'cpp'
+from Cython.Distutils import Extension as CyExtension
+HAS_CYTHON = True
+cy_ext = 'pyx'
+print('*** NOTE: Found Cython, extension files will be '
+      'transpiled if this is an install invocation.',
+      file=sys.stderr)
 
 # strip out -Wstrict-prototypes; a hack suggested by
 # http://stackoverflow.com/a/9740721
