1.1+18: glpk/dune-shared failure

[jamesjer]

Attempting to use src/glpk/dune-shared fails with version 1.1+18:

File "src/glpk/dune", lines 1-8, characters 0-169:
1 | (library
2 |  (name mccs_hostglpk_shared)
3 |  (public_name mccs.glpk.shared)
4 |  (modules ocaml_mccs_glpk)
5 |  (c_library_flags
6 |   :standard
7 |   (:include clibs.sexp))
8 |  (wrapped false))
Error: No rule found for src/glpk/clibs.sexp

Given the changes in c685e0b, I tried changing clibs.sexp to ../clibs.sexp, which "works" (i.e., the build completes), but is that correct?