pyzfs: Adapt directory evaluation from ax_python_devel.m4

71216b9 introduced a regression
on debian/ubuntu systems during build.

The reason being, that building the RPM for pyzfs was using
a different library path than building the library itself.
This is now harmonized.

Closes: #16155

Signed-off-by: Martin Rüegg <[email protected]>

Author: martin-rueegg

rpm/generic/zfs.spec.in

@@ -87,7 +87,19 @@
 %define __python                  %{__use_python}
 %define __python_pkg_version      %{__use_python_pkg_version}
 %endif
-%define __python_sitelib          %(%{__python} -Esc "from distutils.sysconfig import get_python_lib; print(get_python_lib())" 2>/dev/null || %{__python} -Esc "import sysconfig; print(sysconfig.get_path('purelib'))")
+%define __python_sitelib          %(%{__python} -Esc "
+import sysconfig;
+if hasattr(sysconfig, 'get_default_scheme'):
+    scheme = sysconfig.get_default_scheme()
+else:
+    scheme = sysconfig._get_default_scheme()
+if scheme == 'posix_local':
+    scheme = 'posix_prefix'
+prefix = '$prefix'
+if prefix == 'NONE':
+    prefix = '$ac_default_prefix'
+sitedir = sysconfig.get_path('platlib', scheme, vars={'platbase': prefix});
+print(sitedir);" 2>/dev/null || %{__python} -Esc "from distutils import sysconfig; print(sysconfig.get_python_lib(1,0))")
 
 Name:           @PACKAGE@
 Version:        @VERSION@