/usr/share/guile/2.0/srfi/ is in guile-2.0-libs 2.0.9+1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/guile/2.0/srfi/srfi-1.scm
/usr/share/guile/2.0/srfi/srfi-10.scm
/usr/share/guile/2.0/srfi/srfi-11.scm
/usr/share/guile/2.0/srfi/srfi-13.scm
/usr/share/guile/2.0/srfi/srfi-14.scm
/usr/share/guile/2.0/srfi/srfi-16.scm
/usr/share/guile/2.0/srfi/srfi-17.scm
/usr/share/guile/2.0/srfi/srfi-18.scm
/usr/share/guile/2.0/srfi/srfi-19.scm
/usr/share/guile/2.0/srfi/srfi-2.scm
/usr/share/guile/2.0/srfi/srfi-26.scm
/usr/share/guile/2.0/srfi/srfi-27.scm
/usr/share/guile/2.0/srfi/srfi-31.scm
/usr/share/guile/2.0/srfi/srfi-34.scm
/usr/share/guile/2.0/srfi/srfi-35.scm
/usr/share/guile/2.0/srfi/srfi-37.scm
/usr/share/guile/2.0/srfi/srfi-38.scm
/usr/share/guile/2.0/srfi/srfi-39.scm
/usr/share/guile/2.0/srfi/srfi-4/
/usr/share/guile/2.0/srfi/srfi-4.scm
/usr/share/guile/2.0/srfi/srfi-4/gnu.scm
/usr/share/guile/2.0/srfi/srfi-41.scm
/usr/share/guile/2.0/srfi/srfi-42/
/usr/share/guile/2.0/srfi/srfi-42.scm
/usr/share/guile/2.0/srfi/srfi-42/ec.scm
/usr/share/guile/2.0/srfi/srfi-45.scm
/usr/share/guile/2.0/srfi/srfi-6.scm
/usr/share/guile/2.0/srfi/srfi-60.scm
/usr/share/guile/2.0/srfi/srfi-67/
/usr/share/guile/2.0/srfi/srfi-67.scm
/usr/share/guile/2.0/srfi/srfi-67/compare.scm
/usr/share/guile/2.0/srfi/srfi-69.scm
/usr/share/guile/2.0/srfi/srfi-8.scm
/usr/share/guile/2.0/srfi/srfi-88.scm
/usr/share/guile/2.0/srfi/srfi-9/
/usr/share/guile/2.0/srfi/srfi-9.scm
/usr/share/guile/2.0/srfi/srfi-9/gnu.scm
/usr/share/guile/2.0/srfi/srfi-98.scm