diff --git a/.github/workflows/package.yml b/.github/workflows/package.yml
index 51694d85b..e7cea8c5c 100644
--- a/.github/workflows/package.yml
+++ b/.github/workflows/package.yml
@@ -62,7 +62,11 @@ jobs:
       run: |
           conda activate hexrd
           mkdir output
-          conda build --override-channels -c conda-forge --output-folder output/ conda.recipe/
+          conda config --env --set solver libmamba
+          conda config --set solver libmamba
+          export CONDA_SOLVER=libmamba
+          conda config --show-sources
+          CONDA_SOLVER=libmamba conda build --override-channels -c conda-forge --output-folder output/ conda.recipe/
       # This is need to ensure ~/.profile or ~/.bashrc are used so the activate
       # command works.
       shell: bash -l {0}