ci: Use ninja to build in macOS native CI job

Author: hebasto

.github/workflows/ci.yml

@@ -105,7 +105,7 @@ jobs:
         run: |
           # A workaround for "The `brew link` step did not complete successfully" error.
           brew install --quiet python@3 || brew link --overwrite python@3
-          brew install --quiet pkg-config gnu-getopt ccache boost libevent miniupnpc libnatpmp zeromq qt@5 qrencode
+          brew install --quiet ninja pkg-config gnu-getopt ccache boost libevent miniupnpc libnatpmp zeromq qt@5 qrencode
 
       - name: Set Ccache directory
         run: echo "CCACHE_DIR=${RUNNER_TEMP}/ccache_dir" >> "$GITHUB_ENV"

ci/test/00_setup_env_mac_native.sh

@@ -10,6 +10,7 @@ export LC_ALL=C.UTF-8
 # Therefore, `--break-system-packages` is needed.
 export PIP_PACKAGES="--break-system-packages zmq"
 export GOAL="install"
+export CMAKE_GENERATOR="Ninja"
 export BITCOIN_CONFIG="-DBUILD_GUI=ON -DWITH_ZMQ=ON -DWITH_MINIUPNPC=ON -DWITH_NATPMP=ON -DREDUCE_EXPORTS=ON"
 export CI_OS_NAME="macos"
 export NO_DEPENDS=1