diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index a096941b..28e2e772 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -25,7 +25,8 @@ jobs:
         python-version: "3.10"
         activate-environment: sparc-test
         conda-build-version: ">=3.20"
-        mamba-version: "*"
+        #mamba-version: "*"
+        miniforge-variant: "Mambaforge" # Fix according to https://github.com/nextstrain/cli/commit/4a764976519ca5c540c745463548a9d883eae079
         channels: conda-forge,defaults
         channel-priority: true
     - name: Install boa dependencies
@@ -54,4 +55,4 @@ jobs:
         # Force fail, see what happens
         unset LD_LIBRARY_PATH
         python -c "import os, re; match = re.findall(r'Tests failed: (\d+)', open('output').read()); [print('All pass'), os._exit(0)] if int(match[0]) == 0 else [print('Failed'), os._exit(1)]"
-        rm -rf output
\ No newline at end of file
+        rm -rf output