For those who like to experiment with different nets I built slim versions of the stockfish family for apple-silicon (M1). The common build usually embeds a default net which lets the size of the binary grow to 20+MB. Thanks to a hint in a German chess forum I now know how to exclude the net. I added

CXXFLAGS += -DNNUE_EMBEDDING_OFF

in the Makefile. Listed below are also two updates from the family (fairy-stockfish-13.1, corchess-1.4).

Binary: corchess-1.4 (update)
Net: nn-7756374aaed3.nnue (default)
Source: https://github.com/IIvec/Stockfish/tree/corchess

Binary: crystal-3.1-slim
Net: nn-62ef826d1a6d (default)
Source: https://github.com/jhellis3/Stockfish/

Binary: fairy-stockfish-13.1 (update)
Net: nn-62ef826d1a6d (default)
Source: https://github.com/ianfab/Fairy-Stockfish/releases/tag/fairy_sf_13_1

Binary: shashchess-17-slim
Net: nn-8a08400ed089.nnue (default)
Source: https://github.com/amchess/ShashChess/releases/tag/17

Binary: stockfish-13-slim
Net: nn-62ef826d1a6d (default)
Source: https://github.com/official-stockfish/Stockfish/releases/tag/sf_13

Binary: stockfish-210523-slim
Net: nn-7756374aaed3.nnue (default)
Source: https://github.com/official-stockfish/Stockfish/tree/master