nocheck vs reproducible-builds

[Santiago Vila]

Hello.

I'm currently building trixie with nocheck. Some packages do this
in the install target and it fails:

cp some-test-files some-doc-directory

A simple ifeq would make nocheck to work again, but then the package
would not build the same with nocheck and without nocheck.

Technically that would be ok, as the definition says "given a set of variables [...]",
and DEB_BUILD_OPTIONS is one of them.

However, is that really an acceptable solution?

In other words: Do we want packages to build the same with nocheck
and without nocheck? (I think we want, but I'd like to hear what
others think about this).

Thanks.