diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 738f9d25275b5b4c38e992daacb085eb5643479e..b34c24f03b18716abc79a14e7f1b505cfea2fe08 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -137,7 +137,7 @@ packages:
   graphviz:
     require:
     - '@8.0.1'
-    - +expat
+    - +expat +pangocairo
   hepmc3:
     require:
     - '@3.2.6'