rustChannel = prev.rust-bin.stable."1.56.0";

          rustChannel = prev.rust-bin.stable."1.58.1";

        "lastModified": 1638161295,
        "narHash": "sha256-gLVjBxvI5tLMl2BzbGnpgVppnAxTrkrVeCyBQ5N6VQs=",

        "lastModified": 1643247693,
        "narHash": "sha256-rmShxIuNjYBz4l83J0J++sug+MURUY1koPCzX4F8hfo=",

        "rev": "8e6b3914626900ad8f465c3e3541edbb86a95d41",

        "rev": "6c4b9f1a2fd761e2d384ef86cff0d208ca27fdca",

        "lastModified": 1638238200,
        "narHash": "sha256-pI6U9yy2McCPGRC2A5KeDq5H5+PUrnsxC6x90XwEEnw=",

        "lastModified": 1642838864,
        "narHash": "sha256-pHnhm3HWwtvtOK7NdNHwERih3PgNlacrfeDwachIG8E=",

        "rev": "c43ac5a913306abe22c9d1ed8453c7819864f31b",

        "rev": "9fb49daf1bbe1d91e6c837706c481f9ebb3d8097",