Install only necessary dependencies since cmake and python already present.

appveyor.yml

@@ -532,7 +532,9 @@ for:
     - sudo xcode-select -s /Applications/Xcode-$XCODE_VERSION.app
     - sudo xcode-select -p
     - brew update > /dev/null
-    - brew install --force qbs
+    - brew deps -n qbs
+    - brew install libpng freetype pcre2 gettext glib jpeg-turbo giflib lz4 xz zstd libtiff webp qt@5
+    - brew install --ignore-dependencies qbs
     - export QTDIR="${HOME}/${QT}"
     - export PATH="$QTDIR/bin:$HOME/.local/bin:`python3 -m site --user-base`/bin:$PATH"
     - echo $PATH