Influx2 query now/d

Runnning this in Grafana gives me an error

from(bucket: "EnergieCnt")
  |> range(start: now/d)
  |> filter(fn: (r) => r["_measurement"] == "EnergieCnt")
  |> filter(fn: (r) => r["Area"] == "Main")
  |> filter(fn: (r) => r["_field"] == "Gas")
  |> aggregateWindow(every: 1d, fn: last)
  |> derivative(unit: 1d, nonNegative: true, columns: ["_value"], timeColumn: "_time") 
  |> limit(n:1, offset: 0)
  |> drop(columns: ["_start","_stop","_measurement","host","_field","Area"])

if i change |> range(start: now/d) to |> range(start: -1d) it works, but i want to get the used gas from the start of today.
the query inspector report the error invalid: error @2:23-2:24: undefined identifier d

Is this not working with the new flux language ?