Evgeny Pisemsky <mail@pisemsky.site> writes:

> * gnu/packages/guile-xyz.scm (guile-mqtt): Patch extension path.
> [arguments]: Add 'patch-extension-path phase.
>
> Change-Id: Ifbbd0adebcf82a36f674ab3fded3db5ba04b98b0
> ---
>  gnu/packages/guile-xyz.scm | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
> index 28a94dc83a..12796749ec 100644
> --- a/gnu/packages/guile-xyz.scm
> +++ b/gnu/packages/guile-xyz.scm
> @@ -1658,7 +1658,18 @@ (define-public guile-mqtt
>      (build-system gnu-build-system)
>      (arguments
>       (list
> -      #:make-flags #~(list "GUILE_AUTO_COMPILE=0")))
> +      #:make-flags
> +      #~(list "GUILE_AUTO_COMPILE=0")
> +      #:phases
> +      #~(modify-phases %standard-phases
> +          (add-after 'unpack 'patch-extension-path
> +            (lambda* (#:key inputs #:allow-other-keys)
> +              (substitute* "module/ffi/mosquitto.scm"
> +                (("list #f \"libmosquitto\"")
> +                 (string-append
> +                  "list #f \""
> +                  (search-input-file inputs "/lib/libmosquitto.so")
> +                  "\""))))))))
>      (native-inputs (list guile-3.0 pkg-config))
>      (inputs (list mosquitto))
>      (home-page "https://github.com/mdjurfeldt/guile-mqtt")
pushed, closing.

If you are interested, you can also try to adjust the package to compile
from the git repository.

>
> base-commit: 295a35ba20257e965c4eba8488de99fce7bf027f