Mamba does not get installed without mamba-version

Author: whatnick

.github/workflows/main.yml

@@ -83,7 +83,7 @@ jobs:
         channels: conda-forge,defaults
         channel-priority: true
         activate-environment: ""
-          # mamba-version: "*"
+        mamba-version: "*"
         use-mamba: true
 
     - name: Dump Conda Environment Info