Error using match with a timeseries database `unknown operator: $match`

[this-josh]

I'm trying to use match with a timeseries database, but I'm getting this error:

julia> import Mongoc
julia> client = Mongoc.Client()
julia> db = client["my_db"]
julia> col = db["timeseries"]
julia> pipeline = Mongoc.BSON("""
       [
           {
           "\$match": {
               "timestamp": {
                   "\$gte": "2022-01-01T00:00:00",
                   "\$lte": "2022-02-01T00:00:00"
               }
           }
           }
       ]""")
julia> Mongoc.find_one(col, pipeline)
ERROR: BSONError: domain=5, code=2, message=unknown operator: $match
Stacktrace:
 [1] _iterate(cursor::Mongoc.Cursor{Mongoc.Collection}, state::Nothing)
   @ Mongoc ~/.julia/packages/Mongoc/tJNDW/src/collection.jl:690
 [2] _iterate
   @ ~/.julia/packages/Mongoc/tJNDW/src/collection.jl:680 [inlined]
 [3] find_one(collection::Mongoc.Collection, bson_filter::Mongoc.BSON; options::Nothing)
   @ Mongoc ~/.julia/packages/Mongoc/tJNDW/src/collection.jl:332
 [4] find_one(collection::Mongoc.Collection, bson_filter::Mongoc.BSON)
   @ Mongoc ~/.julia/packages/Mongoc/tJNDW/src/collection.jl:327
 [5] top-level scope
   @ REPL[7]:1