Most teams don't get #Nix wrong on day one, but on day 300, when ten engineers have copied the same "it works" pattern into 20 repos. Remember the free print book from #NixCon 2025 & #PlanetNix 2026? It grew to 93 pages: 40 anti-patterns, 14 of them new, each with before/after code. Technical editing by Valentin Gagarin (@fricklerhandwerk), founding member of the Nix docs & maintainer teams. 4 recipes free: https://tinyurl.com/42ueycn7 #Nix #NixOS