diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 9e5ae5202fb7fe39a4418c64b974879d8e618d2f..8150665b5869aa8f4da0ea74e808416b6a2fbcc4 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -361,6 +361,9 @@ packages:
     - '@6.30.02'
     - cxxstd=20 +fftw +fortran +gdml +http -ipo +mlp +python +root7 +tmva +tmva-sofie +vc +xrootd +ssl
     - any_of: [+opengl +webgui +x, -opengl -webgui -x]
+  simsipm:
+    require:
+    - '@2.0.2'
   snakemake:
     require:
     - '@7.22.0'
diff --git a/spack-environment/xl/spack.yaml b/spack-environment/xl/spack.yaml
index b3bfe260f06c65a808950f2ad183a440e1d2f505..9b2fa9ec26e79739a0cc6b8199167b452bbfefab 100644
--- a/spack-environment/xl/spack.yaml
+++ b/spack-environment/xl/spack.yaml
@@ -94,6 +94,7 @@ spack:
   - py-wurlitzer
   - py-yapf
   - root +opengl +webgui +x
+  - simsipm
   - snakemake
   - spdlog
   - stow