%Error-MODMISSING: t/t_gen_nonconst_bad.v:8:4: Cannot find file containing module: 'nfound'
    8 |    nfound nfound();
      |    ^~~~~~
                   ... For error description see https://verilator.org/warn/MODMISSING?v=latest
                   ... This may be because there's no search path specified with -I<dir>.
                   ... Looked in:
                        nfound
                        nfound.v
                        nfound.sv
                        obj_dir/nfound
                        obj_dir/nfound.v
                        obj_dir/nfound.sv
%Error: Exiting due to