diff --git a/scripts/mk_nuget_task.py b/scripts/mk_nuget_task.py
index 7026b195e..cf7140e5e 100644
--- a/scripts/mk_nuget_task.py
+++ b/scripts/mk_nuget_task.py
@@ -24,7 +24,7 @@ def mk_dir(d):
 os_info = {  'ubuntu-latest' : ('so', 'linux-x64'),
              'ubuntu-18' : ('so', 'linux-x64'),
              'ubuntu-20' : ('so', 'linux-x64'),
-             'x64-glibc-2.35' : ('so', 'linux-x64'),
+             'x64-glibc-2.31' : ('so', 'linux-x64'),
              'x64-win' : ('dll', 'win-x64'),
              'x86-win' : ('dll', 'win-x86'),
              'x64-osx' : ('dylib', 'osx-x64'),