install failing

[jmikedupont2]

      ------------------------------------------------------------
      ...
              dec(end)
              # Construct our arguments
              cdef pair[ITYPE_t, DTYPE_t] args
              args.first = key
              args.second = value
              self.my_map.insert(end, args)
                                 ^
      ------------------------------------------------------------

      sklearn/utils/_fast_dict.pyx:138:27: Cannot assign type 'iterator' to 'const_iterator'```