diff --git a/.github/workflows/build_docs.yml b/.github/workflows/build_docs.yml
index 262a4d9..dbd71a9 100644
--- a/.github/workflows/build_docs.yml
+++ b/.github/workflows/build_docs.yml
@@ -21,6 +21,8 @@ jobs:
             miniforge-variant: Mambaforge
             miniforge-version: latest
             activate-environment: amworkflow
+            environment-file: environment.yml
+            auto-active-base: false
             use-mamba: true
 
       - name: Set cache date