Test specific instructions

It worked in the last commit, let's see if we can simplify it.

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

.github/workflows/package.yml

@@ -62,15 +62,14 @@ jobs:
       if: ${{ matrix.config.name != 'Linux' }}
       run: |
           conda activate hexrd
-          conda install -n base -c conda-forge conda-libmamba-solver
+          # FIXME: why do we have to set this again? It was set in the previous step!
           conda install -c conda-forge conda-libmamba-solver
-          conda config --set solver libmamba
           conda config --env --set solver libmamba
           mkdir output
           # 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/
+          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}