diff --git a/.github/ci/spack-envs/clang14_py311_nompi_h5_ad2/spack.yaml b/.github/ci/spack-envs/clang14_py311_nompi_h5_ad2/spack.yaml
index d06a6e3cae..ffd7995cae 100644
--- a/.github/ci/spack-envs/clang14_py311_nompi_h5_ad2/spack.yaml
+++ b/.github/ci/spack-envs/clang14_py311_nompi_h5_ad2/spack.yaml
@@ -13,7 +13,7 @@ spack:
     hdf5:
       variants: ~mpi
     adios2:
-      variants: ~mpi ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+      variants: ~mgard ~mpi ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
     cmake:
       externals:
       - spec: cmake@3.22.1
diff --git a/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2/spack.yaml b/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2/spack.yaml
index ccd5f9dd57..6271954f1b 100644
--- a/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2/spack.yaml
+++ b/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2/spack.yaml
@@ -12,7 +12,7 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+      variants: ~mgard ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
     cmake:
       externals:
       - spec: cmake@3.23.0
diff --git a/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2_libcpp/spack.yaml b/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2_libcpp/spack.yaml
index da7ec054c7..928a2e8d3d 100644
--- a/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2_libcpp/spack.yaml
+++ b/.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2_libcpp/spack.yaml
@@ -12,7 +12,7 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+      variants: ~mgard ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
     cmake:
       externals:
       - spec: cmake@3.23.0
diff --git a/.github/ci/spack-envs/clang8_py38_mpich_h5_ad2/spack.yaml b/.github/ci/spack-envs/clang8_py38_mpich_h5_ad2/spack.yaml
index 45b794edff..b519163481 100644
--- a/.github/ci/spack-envs/clang8_py38_mpich_h5_ad2/spack.yaml
+++ b/.github/ci/spack-envs/clang8_py38_mpich_h5_ad2/spack.yaml
@@ -12,7 +12,7 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+      variants: ~mgard ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
     cmake:
       externals:
       - spec: cmake@3.23.0
diff --git a/.github/ci/spack-envs/clangtidy_nopy_ompi_h5_ad2/spack.yaml b/.github/ci/spack-envs/clangtidy_nopy_ompi_h5_ad2/spack.yaml
index b585b682be..fcb1137b55 100644
--- a/.github/ci/spack-envs/clangtidy_nopy_ompi_h5_ad2/spack.yaml
+++ b/.github/ci/spack-envs/clangtidy_nopy_ompi_h5_ad2/spack.yaml
@@ -12,7 +12,7 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+      variants: ~mgard ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
     cmake:
       externals:
       - spec: cmake@3.23.0
diff --git a/.github/ci/spack-envs/gcc7_py36_ompi_h5_ad2/spack.yaml b/.github/ci/spack-envs/gcc7_py36_ompi_h5_ad2/spack.yaml
index 2815004df4..74fd0f8229 100644
--- a/.github/ci/spack-envs/gcc7_py36_ompi_h5_ad2/spack.yaml
+++ b/.github/ci/spack-envs/gcc7_py36_ompi_h5_ad2/spack.yaml
@@ -12,7 +12,7 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+      variants: ~mgard ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
     cmake:
       externals:
       - spec: cmake@3.23.0
diff --git a/.github/ci/spack-envs/gcc_py_ompi_h5_ad2_arm64/spack.yaml b/.github/ci/spack-envs/gcc_py_ompi_h5_ad2_arm64/spack.yaml
index 0941ce4f86..ffe630d906 100644
--- a/.github/ci/spack-envs/gcc_py_ompi_h5_ad2_arm64/spack.yaml
+++ b/.github/ci/spack-envs/gcc_py_ompi_h5_ad2_arm64/spack.yaml
@@ -12,7 +12,7 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+      variants: ~mgard ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
     cmake:
       externals:
       - spec: cmake@3.22.1