diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a40552e..9635086 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,7 +30,6 @@ jobs:
           auto-activate-base: false
           activate-environment: psqan_venv
           environment-file: environment.yml
-          conda-remove-defaults: "true"
 
       - name: unit tests
         run: |