try fix last again

Author: james-d-mitchell

.github/workflows/runtests.yml

@@ -68,16 +68,17 @@ jobs:
              echo "CXX=$CXX" >> $GITHUB_ENV
              CC=clang-$LLVM_VERSION
              echo "CC=$CC" >> $GITHUB_ENV
-             CXX=clang-$LLVM_VERSION
+             CXX=clang++-$LLVM_VERSION
              echo "CXX=$CXX" >> $GITHUB_ENV
-             echo "PATH=/home/linuxbrew/.linuxbrew/opt/llvm@$LLVM_VERSION/bin" >> $GITHUB_PATH
+             echo "PATH=/home/linuxbrew/.linuxbrew/opt/llvm@$LLVM_VERSION/bin" >> $GITHUB_ENV
          - name: "Install dependencies . . ."
            run: |
              sudo apt-get install --yes ccache
          - name: "Configure the HPCombi build . . ."
            env:
              CC: ${{ env.CC }}
              CXX: ${{ env.CXX }}
+             PATH: ${{ env.PATH }}
            run: |
              mkdir build
              cd build