On Tue, Dec 13, 2016 at 05:15:05PM -0500, Leo Famulari wrote:
> I'm successfully using this package with this change.
> 
> I don't know if this is the "right way" to solve this. Your thoughts?

To clarify, here is what happens on Debian Jessie without this change:

$ acme-client -nN example.com
acme-client: tls_config_set_ca_file: failed to open CA file '/etc/ssl/cert.pem': No such file or directory: No such file or directory

And here are the upstream notes on this subject [0]:

"You can also set DEFAULT_CA_FILE for the location of the certificate
file loaded by libtls."

https://github.com/kristapsdz/acme-client-portable/blob/master/README.md#configuration

> +             (let ((pem (string-append (assoc-ref inputs "libressl")
> +                                       "/etc/ssl/cert.pem")))
> +               (substitute* "http.c"
> +                 (("/etc/ssl/cert.pem") pem))

The upstream maintainer recommends setting this value in 'config.h', but
it's only used in 'http.c', so I thought this solution would be a little
easier to read.