Test Nix Flake

`nix flake update` #468

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Run time

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Job	Run time
Nix on ubuntu-24.04-arm	6h 5m 1s
Nix on macos-latest	47m 16s
Nix on ubuntu-latest	52m 47s
Nix on macos-latest	32m 50s
Nix on ubuntu-24.04-arm	23m 46s
Nix on ubuntu-latest	33m 39s
	9h 15m 19s