diff --git a/.github/workflows/build-wheels-linux.yml b/.github/workflows/build-wheels-linux.yml
index 03921db..8f31da5 100644
--- a/.github/workflows/build-wheels-linux.yml
+++ b/.github/workflows/build-wheels-linux.yml
@@ -51,7 +51,7 @@ jobs:
     env:
       REPO_DIR: netcdf4-python
       PKG_NAME: netcdf4-python
-      MB_ML_VER: _2_28
+      MB_ML_VER: _2_24
       #MB_ML_VER: 2014
       BUILD_COMMIT: v1.6.5rel
       UNICODE_WIDTH: 32