Jakub Sokołowski f1f3d9f7f8 mtr: fix JSON output format, add libjansson ... Currently if you try to use `mtr` with `-j`/`--json` flag you get: ``` mtr: invalid option -- 'j' ``` In order to make this work it has to be built with `libjansson`: https://github.com/traviscross/mtr/issues/358 Signed-off-by: Jakub Sokołowski <jakub@status.im>		2021-11-14 19:36:33 +01:00
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default.nix