TEST: Set solver again to make sure it works

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

.github/workflows/package.yml

@@ -45,10 +45,11 @@ jobs:
 
     - name: Install build requirements
       run: |
-          conda activate hexrd
           # Change default solver to be libmamba, so that it runs much faster
           conda install -n base -c conda-forge conda-libmamba-solver
           conda config --set solver libmamba
+
+          conda activate hexrd
           # FIXME: downgrade urllib3 until this issue is fixed:
           # https://github.com/Anaconda-Platform/anaconda-client/issues/654
           conda install --override-channels -c conda-forge anaconda-client conda-build conda 'urllib3<2.0.0'
@@ -62,7 +63,10 @@ jobs:
       run: |
           conda activate hexrd
           mkdir output
-          conda build --override-channels -c conda-forge --output-folder output/ conda.recipe/
+          # Conda build is ignoring the .condarc for some reason, so we need to
+          # set this environment variable instead.
+          export CONDA_SOLVER=libmamba
+          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}