In the Guile 3.0.10 package provided by this distribution, the standard procedure regexp-compile is not exported by the (ice-9 regex) module. This causes an "Unbound variable: regexp-compile" error when attempting to use this procedure after loading the module with (use-modules (ice-9 regex)).
I am using the Arch Linux distribution, and it does seem to leave the package alone. Did you deprecate the procedure, or something?