%Error: t/t_gen_nonconst_bad.v:8:4: Cannot find file containing module: 'nfound'
    8 |    nfound nfound();
      |    ^~~~~~
        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
        ... 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