diff --git a/.github/workflows/ci-ifcopenshell-conda-cleaner.yml b/.github/workflows/ci-ifcopenshell-conda-cleaner.yml
index 676355db4d..3446e0ae43 100644
--- a/.github/workflows/ci-ifcopenshell-conda-cleaner.yml
+++ b/.github/workflows/ci-ifcopenshell-conda-cleaner.yml
@@ -18,6 +18,9 @@ env:
 jobs:
   activate:
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
     if: |
       github.repository == 'IfcOpenShell/IfcOpenShell'
     steps:
@@ -95,4 +98,4 @@ jobs:
           
           main()
           
-          EOF
\ No newline at end of file
+          EOF