Looking at Koha 3.8.3 on my "desktop" (64-bit Ubuntu 12.04 server plus Gnome 2.3 utilities, graphics etc) Final unmet dependencies are: Graphics::Magick 0 * 1.3.05 No Net::Z3950::ZOOM 0 * 1.16 Yes XML::LibXSLT 0 * 1.59 Yes The last two are problematic. As far as I can see after a fair amount of trying (CPAN, Debian and Ubuntu repositories) they both, via yaz, are dependant on libyaz-dev which in turn allows libxml2-dev. The most promising source appears to be libyaz4-dev_4.2.18-1build1_i386.deb -- but this fails miserably (despite "force install" and apt-get -f) as the 64-bit system refuses these particular i386 packages, ultimately with: (Reading database ... 176579 files and directories currently installed.) Unpacking libxml2-dev:i386 (from .../libxml2-dev_2.7.8.dfsg-5.1ubuntu4.1_i386.deb) ... dpkg: error processing /var/cache/apt/archives/libxml2-dev_2.7.8.dfsg-5.1ubuntu4.1_i386.deb (--unpack): './usr/bin/xml2-config' is different from the same file on the system dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Processing triggers for man-db ... Errors were encountered while processing: /var/cache/apt/archives/libxml2-dev_2.7.8.dfsg-5.1ubuntu4.1_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1) Does any one have pointers to a 64 bit package for Net::Z3950::ZOOM and XML::LibXSLT (or another workaround)? Also, while Graphics::Magick might not be "required", can anyone tell me what if any functionality might be impacted? Just for the record, all dependencies installed without problems on our production server (64-bit, but Ubuntu 11.10 and Koha 3.6.1) and on my sandbox (12.04, 3.6.7) but it is an older 32-bit machine. Many thanks and best regards, Paul