diff --git a/env/merlin/spack.yaml b/env/merlin/spack.yaml
index d048d73..b545cdf 100644
--- a/env/merlin/spack.yaml
+++ b/env/merlin/spack.yaml
@@ -15,10 +15,10 @@ spack:
         # E.G: removing atlas from testing, since it taking way too much time. Installation working though.
         # - atlas%gcc
         # - clapack%gcc
-        - boost%gcc
-        - boost%oneapi
         - boost%clang
+        - boost%gcc
         - boost%nvhpc
+        - boost%oneapi
         - clhep%gcc
         - eigen%gcc
         - geant4%gcc
@@ -33,7 +33,7 @@ spack:
         - openblas%gcc threads=none
         - openblas%gcc threads=openmp
         - openmpi%gcc
-        - root%gcc
+        - root%gcc ~tbb~x
         - superlu%gcc
         - vtk%gcc
     - Cuda_pckgs: &Cuda_pckgs