Compilation fails due to unknown sed option

[sim642]

All Apron-dependent GitHub Actions jobs for Goblint fail during the build of this package with:

#=== ERROR while compiling ez-conf-lib.1 ======================================#
# context     2.1.5 | linux/x86_64 | ocaml-base-compiler.5.0.0 | git+https://github.com/ocaml/opam-repository.git
# path        ~/work/analyzer/analyzer/_opam/.opam-switch/build/ez-conf-lib.1
# command     ~/.opam/opam-init/hooks/sandbox.sh build sh -ecx sed -e 's_@@ez-conf-lib:lib@@_/home/runner/work/analyzer/analyzer/_opam/lib/ez-conf-lib_g' ez-conf-lib.config.in > ez-conf-lib.config
# exit-code   1
# env-file    ~/.opam/log/ez-conf-lib-16891-b0399b.env
# output-file ~/.opam/log/ez-conf-lib-16891-b0399b.out
### output ###
# + sed -e s_@@ez-conf-lib:lib@@_/home/runner/work/analyzer/analyzer/_opam/lib/ez-conf-lib_g ez-conf-lib.config.in
# sed: -e expression #1, char 60: unknown option to `s'

(https://github.com/goblint/analyzer/actions/runs/7866405426/job/21460633443).

[sim642]

The problem is using _ as the separator character for the sed expression on paths: local opam switches use the _opam subdirectory, where the _ causes sed to delimit things in an unintended way.