GHA: Fix CI issues

Author: benlandrum

.github/workflows/main.yml

@@ -21,30 +21,38 @@ jobs:
         mpi:
           - mpich
           - openmpi
-        python-version:
-          - "3.7"
-          - "3.8"
-          - "3.9"
+        py:
+          # - "3.7"
+          # - "3.8"
+          # - "3.9"
           - "3.10"
           - "3.11"
-          - "3.12-dev"
+          - "3.12"
 
     steps:
 
     - uses: actions/checkout@v3
 
     - uses: actions/setup-python@v4
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: ${{ matrix.py }}
 
     - run: |
         # Install fftw
         case $(uname) in
           Linux)
-          sudo apt update && sudo apt install -y -q fftw-dev
+            sudo apt update
+            sudo apt install -y -q fftw-dev
+            prefix=/usr
+            echo FFTW_INCLUDE_DIR=$prefix/include >> $GITHUB_ENV
+            echo FFTW_LIBRARY_DIR=$prefix/lib     >> $GITHUB_ENV
             ;;
           Darwin)
+            export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
             brew install fftw
+            prefix=$(brew --prefix fftw)
+            echo FFTW_INCLUDE_DIR=$prefix/include >> $GITHUB_ENV
+            echo FFTW_LIBRARY_DIR=$prefix/lib     >> $GITHUB_ENV
             ;;
         esac