diff -ruN samba-4.12.0_orig/python/samba/provision/__init__.py samba-4.12.0/python/samba/provision/__init__.py
--- samba-4.12.0_orig/python/samba/provision/__init__.py	2020-01-31 18:25:36.000000000 +0800
+++ samba-4.12.0/python/samba/provision/__init__.py	2020-03-19 15:31:58.309648340 +0800
@@ -2200,7 +2200,8 @@
     root_gid = pwd.getpwuid(root_uid).pw_gid
 
     try:
-        bind_gid = findnss_gid(["bind", "named"])
+        # ROSA's bind package must have user group 'named' by default (package 9.11.4-P1-1 does not have it, but I'll make it have it)
+        bind_gid = findnss_gid(["named", "bind"])
     except KeyError:
         bind_gid = None
 
diff -ruN samba-4.12.0_orig/source4/scripting/bin/samba_upgradedns samba-4.12.0/source4/scripting/bin/samba_upgradedns
--- samba-4.12.0_orig/source4/scripting/bin/samba_upgradedns	2020-01-31 18:25:36.000000000 +0800
+++ samba-4.12.0/source4/scripting/bin/samba_upgradedns	2020-03-19 15:31:58.309648340 +0800
@@ -76,7 +76,7 @@
 def find_bind_gid():
     """Find system group id for bind9
     """
-    for name in ["bind", "named"]:
+    for name in ["named", "bind"]:
         try:
             return grp.getgrnam(name)[2]
         except KeyError: