/usr/share/guile/1.8/lang/ is in guile-1.8-libs 1.8.8+1-10ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/guile/1.8/lang/elisp/
/usr/share/guile/1.8/lang/elisp/base.scm
/usr/share/guile/1.8/lang/elisp/example.el
/usr/share/guile/1.8/lang/elisp/interface.scm
/usr/share/guile/1.8/lang/elisp/internals/
/usr/share/guile/1.8/lang/elisp/internals/evaluation.scm
/usr/share/guile/1.8/lang/elisp/internals/format.scm
/usr/share/guile/1.8/lang/elisp/internals/fset.scm
/usr/share/guile/1.8/lang/elisp/internals/lambda.scm
/usr/share/guile/1.8/lang/elisp/internals/load.scm
/usr/share/guile/1.8/lang/elisp/internals/null.scm
/usr/share/guile/1.8/lang/elisp/internals/set.scm
/usr/share/guile/1.8/lang/elisp/internals/signal.scm
/usr/share/guile/1.8/lang/elisp/internals/time.scm
/usr/share/guile/1.8/lang/elisp/internals/trace.scm
/usr/share/guile/1.8/lang/elisp/primitives/
/usr/share/guile/1.8/lang/elisp/primitives/buffers.scm
/usr/share/guile/1.8/lang/elisp/primitives/char-table.scm
/usr/share/guile/1.8/lang/elisp/primitives/features.scm
/usr/share/guile/1.8/lang/elisp/primitives/fns.scm
/usr/share/guile/1.8/lang/elisp/primitives/format.scm
/usr/share/guile/1.8/lang/elisp/primitives/guile.scm
/usr/share/guile/1.8/lang/elisp/primitives/keymaps.scm
/usr/share/guile/1.8/lang/elisp/primitives/lists.scm
/usr/share/guile/1.8/lang/elisp/primitives/load.scm
/usr/share/guile/1.8/lang/elisp/primitives/match.scm
/usr/share/guile/1.8/lang/elisp/primitives/numbers.scm
/usr/share/guile/1.8/lang/elisp/primitives/pure.scm
/usr/share/guile/1.8/lang/elisp/primitives/read.scm
/usr/share/guile/1.8/lang/elisp/primitives/signal.scm
/usr/share/guile/1.8/lang/elisp/primitives/strings.scm
/usr/share/guile/1.8/lang/elisp/primitives/symprop.scm
/usr/share/guile/1.8/lang/elisp/primitives/syntax.scm
/usr/share/guile/1.8/lang/elisp/primitives/system.scm
/usr/share/guile/1.8/lang/elisp/primitives/time.scm
/usr/share/guile/1.8/lang/elisp/transform.scm
/usr/share/guile/1.8/lang/elisp/variables.scm