zypper install --no-recommends cmake doxygen eigen3-devel fontconfig-devel gcc-c graphviz++ harfbuzz-devel libSDL2-devel libSDL2_image-devel libepoxy-devel libfreetype-dev libogg-devel libopus-devel libpng-devel libtoml11-dev libqt6-qtdeclarative-devel libqt6-qtquickcontrols opusfile-devel python3-Cython python3-Mako python3-lz4 python3-Pillow python3-Pygments python3-toml python3-devel
You will also need nyan and its dependencies.