diff --git a/.github/workflows/build_release.yml b/.github/workflows/build_release.yml
index d72b5068..086f251c 100644
--- a/.github/workflows/build_release.yml
+++ b/.github/workflows/build_release.yml
@@ -157,7 +157,7 @@ jobs:
                 -c https://ska:${CONDA_PASSWORD}@cxc.cfa.harvard.edu/mta/ASPECT/ska3-conda/flight \
                 ${{ matrix.package }}==${RELEASE_TAG}
           source activate ${{ matrix.package }}-${RELEASE_TAG}
-          conda install -y -n --override-channels \
+          mamba install -y --override-channels \
                 -c https://ska:${CONDA_PASSWORD}@cxc.cfa.harvard.edu/mta/ASPECT/ska3-conda/test \
                 -c https://ska:${CONDA_PASSWORD}@cxc.cfa.harvard.edu/mta/ASPECT/ska3-conda/masters  \
                 -c https://ska:${CONDA_PASSWORD}@cxc.cfa.harvard.edu/mta/ASPECT/ska3-conda/flight \