diff --git a/eic-spack.sh b/eic-spack.sh
index c4350105..29078d79 100644
--- a/eic-spack.sh
+++ b/eic-spack.sh
@@ -3,4 +3,4 @@ EICSPACK_ORGREPO="eic/eic-spack"
 
 ## EIC spack commit hash or github version, e.g. v0.19.7
 ## note: nightly builds could use a branch e.g. releases/v0.19
-EICSPACK_VERSION="f07e969995563a11ca81138b4489b090c08ac71a"
+EICSPACK_VERSION="ac428a2d42304ec8a1fca615235c388684b5983d" # FIXME once eic-spack merged
diff --git a/spack-environment/cuda/spack.yaml b/spack-environment/cuda/spack.yaml
index 0a5e16a4..a668eb43 100644
--- a/spack-environment/cuda/spack.yaml
+++ b/spack-environment/cuda/spack.yaml
@@ -25,6 +25,7 @@ spack:
   - dpmjet
   - east
   - edm4hep
+  - eic-opticks
   - eic-smear
   - eigen
   - emacs
diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 323bf0f9..c8759e89 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -136,6 +136,9 @@ packages:
     externals:
     - spec: egl@1.5.0
       prefix: /usr
+  eic-opticks:
+    require:
+    - '@7057d7bd7f755253c416b813e59f0af28de98ddc'
   eic-smear:
     require:
     - '@1.1.16'