Dumping modules outside of install.pike - how to?

As mentioned in the other posting, I have the following problem:

/usr/lib/pike7.3/7.3.58/modules/Standards.pmod/PKCS.pmod/RSA.pmod.o:-: Warning: Decode failed: Failed to decode program "/tmp/buildd/pike7.3-7.3.58/lib/modules/Crypto/rsa.pike".

it happens because I have to redump the PKCS module in the Debian compliation process, otherwise the .o files in PKCS.pmod will have incorrect data. I'm dumping the modules with a line similar to that used from within install.pike (see lines 51, 52 and 182 of the packaging/debian/rules file) and yet the dumped files have incorrect paths embedded in them. I'd appreciate some help on that one...