Update ci.yml

.github/workflows/ci.yml

@@ -215,9 +215,8 @@ jobs:
           git clone --depth=1 -b release/${{ matrix.clang-runtime }}.x https://github.com/llvm/llvm-project.git clang-dev
         fi
         cd clang-dev
-        # Build
-        mkdir build
         if [[ "${cling_on}" == "ON" ]]; then
+          mkdir build
           cd build
           #FIXME: Cannot build with openmp project on osx Github runners
           #despite being able to install locally
@@ -239,6 +238,7 @@ jobs:
           cmake --build . --target gtest_main --parallel ${{ env.ncpus }}
           cd ../
         else
+          mkdir build
           mkdir inst
           # Apply patches
           git apply -v ../patches/llvm/clang${{ matrix.clang-runtime }}-*.patch