/usr/share/lisaac/lib/unstable/expat-binding/ is in lisaac-common 1:0.39~rc1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/lisaac/lib/unstable/expat-binding/Libexpat.sxp
/usr/share/lisaac/lib/unstable/expat-binding/src/
/usr/share/lisaac/lib/unstable/expat-binding/src/attribute.li
/usr/share/lisaac/lib/unstable/expat-binding/src/content_quant.li
/usr/share/lisaac/lib/unstable/expat-binding/src/content_type.li
/usr/share/lisaac/lib/unstable/expat-binding/src/context.li
/usr/share/lisaac/lib/unstable/expat-binding/src/encoding.li
/usr/share/lisaac/lib/unstable/expat-binding/src/error.li
/usr/share/lisaac/lib/unstable/expat-binding/src/expat.li
/usr/share/lisaac/lib/unstable/expat-binding/src/handlers.li
/usr/share/lisaac/lib/unstable/expat-binding/src/parser.li
/usr/share/lisaac/lib/unstable/expat-binding/src/parsing.li
/usr/share/lisaac/lib/unstable/expat-binding/src/parsing_status.li
/usr/share/lisaac/lib/unstable/expat-binding/src/private/
/usr/share/lisaac/lib/unstable/expat-binding/src/private/char.li
/usr/share/lisaac/lib/unstable/expat-binding/src/private/enum.li
/usr/share/lisaac/lib/unstable/expat-binding/src/private/expat_object.li
/usr/share/lisaac/lib/unstable/expat-binding/src/private/lchar.li
/usr/share/lisaac/lib/unstable/expat-binding/src/private/xml_bool.li
/usr/share/lisaac/lib/unstable/expat-binding/src/status.li
/usr/share/lisaac/lib/unstable/expat-binding/src/str/
/usr/share/lisaac/lib/unstable/expat-binding/src/str/char.li
/usr/share/lisaac/lib/unstable/expat-binding/src/str/lchar.li
/usr/share/lisaac/lib/unstable/expat-binding/src/str/str.li