diff --git a/var/spack/repos/builtin/packages/xsdk/package.py b/var/spack/repos/builtin/packages/xsdk/package.py
index 832ee797f1..8b3418c8bd 100644
--- a/var/spack/repos/builtin/packages/xsdk/package.py
+++ b/var/spack/repos/builtin/packages/xsdk/package.py
@@ -35,7 +35,7 @@ class Xsdk(Package):
     depends_on('hypre@2.12.1~internal-superlu', when='@0.3.0')
     depends_on('hypre@xsdk-0.2.0~internal-superlu', when='@xsdk-0.2.0')
 
-    depends_on('mfem@develop+mpi+hypre+superlu-dist+petsc+sundials+examples+miniapps', when='@develop')
+    depends_on('mfem@develop+mpi+hypre+superlu-dist+petsc~sundials+examples+miniapps', when='@develop')
     depends_on('mfem@3.4.0+mpi+hypre+superlu-dist+petsc+sundials+examples+miniapps', when='@0.4.0')
     depends_on('mfem@3.3.2+mpi+hypre+superlu-dist+petsc+sundials+examples+miniapps', when='@0.3.0')
 
@@ -62,7 +62,7 @@ class Xsdk(Package):
     depends_on('petsc@xsdk-0.2.0+trilinos+mpi+hypre+superlu-dist+metis+hdf5~mumps+double~int64',
                when='@xsdk-0.2.0')
 
-    depends_on('dealii@develop~assimp~python~doc~gmsh+petsc+slepc+mpi+trilinos~int64+hdf5~netcdf+metis', when='@develop +dealii')
+    depends_on('dealii@develop~assimp~python~doc~gmsh+petsc+slepc+mpi+trilinos~int64+hdf5~netcdf+metis~sundials', when='@develop +dealii')
     depends_on('dealii@9.0.1~assimp~python~doc~gmsh+petsc~slepc+mpi+trilinos~int64+hdf5~netcdf+metis', when='@0.4.0 +dealii')
 
     depends_on('pflotran@develop', when='@develop')
@@ -75,7 +75,7 @@ class Xsdk(Package):
     depends_on('alquimia@xsdk-0.3.0', when='@0.3.0')
     depends_on('alquimia@xsdk-0.2.0', when='@xsdk-0.2.0')
 
-    depends_on('sundials@3.2.1~int64+hypre', when='@develop')
+    depends_on('sundials@4.1.0~int64+hypre', when='@develop')
     depends_on('sundials@3.2.1~int64+hypre', when='@0.4.0')
     depends_on('sundials@3.1.0~int64+hypre', when='@0.3.0')