diff --git a/env/merlin/spack.yaml b/env/merlin/spack.yaml
index 8b68cb2..6acdcda 100644
--- a/env/merlin/spack.yaml
+++ b/env/merlin/spack.yaml
@@ -12,9 +12,8 @@ spack:
     - Batchsystem_pckgs: &Batchsystem_pckgs
         - slurm
     - Compiler_pckgs: &Compiler_pckgs
-        # E.G: removing atlas from testing, since it taking way too much time. Installation working though.
-        # - atlas
-        # - clapack
+        - atlas
+        - clapack
         - boost
         - clhep
         - eigen
@@ -71,7 +70,7 @@ spack:
         - hdf5+mpi
         - netcdf-c
         - netcdf-fortran
-        - netcdf-c +parallel-netcdf
+        - netcdf-c
         - trilinos
     - HDF5_serial_pckgs: &HDF5_serial_pckgs
         - hdf5~mpi