r/NixOS • u/BridgeBeginning5817 • 22h ago

Getting error on nix flake update 

nix flake update 

error: \[json.exception.parse_error.101\] parse error at line 1, column 1: attempting to parse an empty input; check that your input string or stream contains the expected JSON

Cleaning cache didn't fix the issue. Have been experiencing this since yesterday.

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u/snowman-london 22h ago

That error means Nix tried to parse a JSON file or HTTP response that came back zero bytes. Check you flake.lock Delete your cache: ~/.cache/nix or /root/.cache/nix. If this does not help try this: nix flake update --debug 2>&1 | tail -50 to catch the actual error.