The Perl bindings are a problem on some platforms (in particular Cygwin and cross-compiled environments), so it would be nice if there was a configure flag to disable building them.

However, the Perl bindings are now used all over the place (e.g. in download-using-manifests), so we'd need some fallback code to handle the absense of the bindings. For instance, functions such as isValidPath() and queryPathHash() can be emulated slowly by calling nix-store.