bug#49369: Duplicated SSL_CERT_DIR value, and the cuirass service

[Vivien Kraus via Bug reports for GNU Guix <bug-guix@gnu.org>]

Dear guix,

When I set up the cuirass service, my /run/current-
system/profile/etc/profile file goes from:

export SSL_CERT_DIR="${GUIX_PROFILE:-
/gnu/store/v7yks560hnm9zkjw1ynsavfdgwbvkq9w-
profile}/etc/ssl/certs${SSL_CERT_DIR:+:}$SSL_CERT_DIR"

to:

export SSL_CERT_DIR="${GUIX_PROFILE:-
/gnu/store/4zby6gn6kv92mn4mck4jw3jxcs82821p-profile}/etc/ssl/certs"

Notice how with cuirass, the variable is expanded to potentially
multiple values.

As a result (I don’t fully understand why), with the cuirass service in
place, my $SSL_CERT_DIR is set to:

/run/current-system/profile/etc/ssl/certs:/run/current-
system/profile/etc/ssl/certs

(notice the duplicated entry)

Due to that, the guile web client is broken because guile does not
support a colon-separated path in SSL_CERT_DIR.

Attributing the blame to this breakage is tricky, because guile is not
100% clean (it should support a path), it’s not clear to me why cuirass
needs to re-define SSL_CERT_DIR, but maybe guix should not consider
that cuirass is installed when it is used as a service.

Best regards,

Vivien