alter conditionals

Author: jcapriot

.github/workflows/python-package-conda.yml

@@ -47,12 +47,12 @@ jobs:
 
     - name: Install MKL solver interface
       # Don't run this on the osx-arm images.
-      if: not(${{ runner.os == 'macOS'}} and contains(runner.arch, 'ARM'))
+      if: $${ !(runner.os == 'macOS' and contains(runner.arch, 'ARM')) }}
       run:
         conda install --quiet --yes -c conda-forge pydiso
 
     - name: Install MUMPS solver interface
-      if: ${{matrix.python-major-version >= 3}} and ${{ matrix.python-minor-version >= 9}}
+      if: ${{ (matrix.python-major-version >= 3) and (matrix.python-minor-version >= 9) }}
       run:
         conda install --quiet --yes -c conda-forge python-mumps