diff --git a/spack.yaml b/spack.yaml
index e3b88ce5a8d1605377ca5d20c82ea2083d94763d..4231e97982ebf24a5ac35488701a1c1cd1d1e248 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -17,14 +17,14 @@ spack:
           +fftw +fortran +gdml +http +mlp +pythia8 
           +root7 +tmva +vc +xrootd +ssl 
           ^mesa swr=none +opengl -llvm -osmesa
-#    - pythia8@8303 +fastjet
-#    - fastjet@3.3.3
-#    - hepmc3@3.2.2 +python +rootio 
-#    - stow@2.3.1
-#    - cairo@1.16.0 +fc+ft+X+pdf+gobject
-#    - podio@0.13.1
-#    - geant4@10.7.1 cxxstd=17 +opengl +vecgeom +x11 +qt +threads ^qt +opengl
-#    - dd4hep@2021-07-21 +geant4 +assimp +hepmc3 +ipo +lcio
+    - pythia8@8303 +fastjet
+    - fastjet@3.3.3
+    - hepmc3@3.2.2 +python +rootio 
+    - stow@2.3.1
+    - cairo@1.16.0 +fc+ft+X+pdf+gobject
+    - podio@0.13.1
+    - geant4@10.7.1 cxxstd=17 +opengl +vecgeom +x11 +qt +threads ^qt +opengl
+    - dd4hep@2021-07-21 +geant4 +assimp +hepmc3 +ipo +lcio
 #    - acts@8.03.0p1 +dd4hep +digitization +identification +json +tgeo +ipo
 #    - genfit@2.00.00
 #    - gaudi@36.0