diff --git a/.github/workflows/build-on-push-to-master.yml b/.github/workflows/build-on-push-to-master.yml
index 5ca2e492..a26deb81 100644
--- a/.github/workflows/build-on-push-to-master.yml
+++ b/.github/workflows/build-on-push-to-master.yml
@@ -30,7 +30,7 @@ jobs:
           python-version: "3.11"
           activate-environment: pyani-github
           auto-activate-base: false
-          channels: defaults,bioconda,conda-forge
+          channels: nodefaults,bioconda,conda-forge
           channel-priority: strict
 
       - name: Check Miniconda Installation