BIN_IO, TEXT_IO, and TEXT_STREAM_IO not recognized

[DarinM223]

When I try to run the latest mlkit compiled from the master branch on these files:

(* hello.sml *)
signature BASIS_BIN_IO = BIN_IO
signature BASIS_TEXT_IO = TEXT_IO
signature BASIS_TEXT_STREAM_IO = TEXT_STREAM_IO

(* hello.mlb *)
$(SML_LIB)/basis/basis.mlb
hello.sml

I get:

mlkit hello.mlb 
[reading source file:	hello.sml]

hello.sml, line 1, column 25:
  signature BASIS_BIN_IO = BIN_IO
                           ^^^^^^
unbound signature identifier BIN_IO.

hello.sml, line 2, column 26:
  signature BASIS_TEXT_IO = TEXT_IO
                            ^^^^^^^
unbound signature identifier TEXT_IO.

hello.sml, line 3, column 33:
  signature BASIS_TEXT_STREAM_IO = TEXT_STREAM_IO
                                   ^^^^^^^^^^^^^^
unbound signature identifier TEXT_STREAM_IO.
Stopping compilation of MLB-file due to error (code 1).

Other basis signatures compile with this mlkit. It like these signatures are under the safeLinkTimeElimination so maybe these signatures are being removed even though they are used?