mkdir -p ~/my-repo/dists/jessie/main/binary-i386
mv libpam-systemd_215-17+deb8u2bu1_i386.deb ~/my-repo/
- dpkg-scanpackages ~/my-repo /dev/null | gzip > ~/my-repo/dists/jessie/main/binary-i386/Packages.gz
+ (cd ~/my-repo; dpkg-scanpackages . /dev/null | gzip > dists/jessie/main/binary-i386/Packages.gz)
Notice that "dpkg-scanpackages" is available through package
*dpkg-dev*.