/usr/ is in cl-postgres 20170403-1.
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/usr/share/
/usr/share/common-lisp/
/usr/share/common-lisp/source/
/usr/share/common-lisp/source/cl-postgres/
/usr/share/common-lisp/source/cl-postgres/cl-postgres/
/usr/share/common-lisp/source/cl-postgres/cl-postgres/bulk-copy.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/communicate.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/errors.lisp
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/usr/share/common-lisp/source/cl-postgres/cl-postgres/sql-string.lisp
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/usr/share/common-lisp/source/cl-postgres/cl-postgres/strings-utf-8.lisp
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/usr/share/common-lisp/source/cl-postgres/cl-postgres/trivial-utf-8.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres.asd
/usr/share/common-lisp/systems/
/usr/share/doc/
/usr/share/doc/cl-postgres/
/usr/share/doc/cl-postgres/changelog.Debian.gz
/usr/share/doc/cl-postgres/copyright
/usr/share/common-lisp/systems/cl-postgres.asd