diff --git a/devtools/conda-envs/examples_env.yaml b/devtools/conda-envs/examples_env.yaml
index cd51766f..582c9200 100644
--- a/devtools/conda-envs/examples_env.yaml
+++ b/devtools/conda-envs/examples_env.yaml
@@ -15,9 +15,6 @@ dependencies:
   # Optional features
   - openff-nagl ~=0.5
   - openff-nagl-models ~=0.3
-  - mbuild ~=0.18
-  - foyer =1
-  - gmso ~=0.12
   - nglview
   # Drivers
   - gromacs