diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 0718f4aa539923b57605c0a9b1309ca2cb536735..ee22f634ea0429b0660f5ef17aad3139544d6a4f 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -49,6 +49,10 @@ packages:
     require:
     - '@3.4.0'
     - -ipo
+  celeritas:
+    require:
+    - '@0.5.0'
+    - +geant4 +hepmc3 +root +vecgeom
   cernlib:
     require:
     - '@2022.11.08.0-free'