Index: setup.py
--- setup.py.orig
+++ setup.py
@@ -113,27 +113,5 @@ setup_args = dict(
 )
 
 
-if any(a.startswith(('bdist', 'install')) for a in sys.argv):
-    from ipykernel.kernelspec import write_kernel_spec, make_ipkernel_cmd, KERNEL_NAME
-
-    # When building a wheel, the executable specified in the kernelspec is simply 'python'.
-    if any(a.startswith('bdist') for a in sys.argv):
-        argv = make_ipkernel_cmd(executable='python')
-    # When installing from source, the full `sys.executable` can be used.
-    if any(a.startswith('install') for a in sys.argv):
-        argv = make_ipkernel_cmd()
-    dest = os.path.join(here, 'data_kernelspec')
-    if os.path.exists(dest):
-        shutil.rmtree(dest)
-    write_kernel_spec(dest, overrides={'argv': argv})
-
-    setup_args['data_files'] = [
-        (
-            pjoin('share', 'jupyter', 'kernels', KERNEL_NAME),
-            glob(pjoin('data_kernelspec', '*')),
-        )
-    ]
-
-
 if __name__ == '__main__':
     setup(**setup_args)