grep -R "lib64z1" /ok/data/aptdir/xenial
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Depends: gcc-5-base (= 5.3.1-14ubuntu2), lib64gcc-5-dev (= 5.3.1-14ubuntu2), lib64z1-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Package: lib64z1
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Filename: pool/main/z/zlib/lib64z1_1.2.8.dfsg-2ubuntu4_i386.deb
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Package: lib64z1-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Depends: lib64z1 (= 1:1.2.8.dfsg-2ubuntu4), zlib1g-dev (= 1:1.2.8.dfsg-2ubuntu4), lib64c-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Filename: pool/main/z/zlib/lib64z1-dev_1.2.8.dfsg-2ubuntu4_i386.deb
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Package: lib64z1
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages:Package: lib64z1-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_universe_binary-i386_Packages:Depends: gdb (= 7.11-0ubuntu1), lib64expat1 (>= 2.0.1), lib64ncurses5 (>= 6), lib64readline6 (>= 6.0), lib64tinfo5 (>= 6), lib64z1 (>= 1:1.2.0), libc6-amd64 (>= 2.15)
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_i18n_Translation-en:Package: lib64z1
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_i18n_Translation-en:Package: lib64z1-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_i18n_Translation-fr:Package: lib64z1
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_i18n_Translation-fr:Package: lib64z1-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_source_Sources:Build-Depends: cdbs (>= 0.4.90), debhelper (>= 9), lsb-release, bzip2, autoconf, libtool, gettext, bison, dejagnu, flex | flex-old, procps, g++-multilib [i386 powerpc s390 sparc], gcj-jdk, gobjc, gccgo, mig [hurd-any], texinfo (>= 4.7-2.2), texlive-base, libexpat1-dev, lib64expat1-dev [i386 powerpc s390 sparc], libncurses5-dev, lib64ncurses5-dev [i386 powerpc s390 sparc], libreadline-dev, lib64readline6-dev [i386 powerpc s390 sparc], zlib1g-dev, liblzma-dev, libbabeltrace-dev [amd64 armel armhf i386 kfreebsd-amd64 kfreebsd-i386 mips mipsel powerpc ppc64 ppc64el s390x], libbabeltrace-ctf-dev [amd64 armel armhf i386 kfreebsd-amd64 kfreebsd-i386 mips mipsel powerpc ppc64 ppc64el s390x], python3-dev, libkvm-dev [kfreebsd-any], libunwind7-dev [ia64], lib64z1-dev [i386 powerpc], texlive-latex-base, texlive-fonts-recommended, cm-super
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_source_Sources:Binary: zlib1g, zlib1g-dev, zlib1g-dbg, zlib1g-udeb, lib64z1, lib64z1-dev, lib32z1, lib32z1-dev, libn32z1, libn32z1-dev, libx32z1, libx32z1-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_source_Sources: lib64z1 deb libs optionnel arch=sparc,s390,i386,powerpc,mips,mipsel
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_source_Sources: lib64z1-dev deb libdevel optionnel arch=sparc,s390,i386,powerpc,mips,mipsel
pk/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_i18n_Translation-fr:Package: lib64z1
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_i18n_Translation-fr:Package: lib64z1-dev
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-amd64_Packages:Package: lib64z1
ok/data/aptdir/xenial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-amd64_Packages:Package: lib64z1-dev