Re: No Guile development packages were found.

[mbcladwell@stihie.net]

Thanks for your assistance.  The final .scm that was successful is:

(use-modules (guix packages)
              (guix download)
              (guix build-system gnu)
              (guix licenses)
	     (gnu packages pkg-config)
	     (gnu packages guile) )

   (package
     (name "guile-json")
     (version "4.3.2")
     (home-page "https://github.com/aconchillo/guile-json")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://savannah/guile-json/guile-json-"
                                   version ".tar.gz"))
               (sha256
                (base32
                 "0255c7f053z4p9mqzhpxwbfx3y47j9nfvlgnm8xasdclyzmjl9y2"))))
     (build-system gnu-build-system)
     (native-inputs `(("pkg-config" ,pkg-config)
                      ))
     (inputs `(("guile" ,guile-3.0)))
     (synopsis "JSON module for Guile")
     (description
      "Guile-JSON supports parsing and building JSON documents according to the
specification.  These are the main features:

@itemize
@item Strictly complies to @uref{http://json.org, specification}.
@item Build JSON documents programmatically via macros.
@item Unicode support for strings.
@item Allows JSON pretty printing.
@end itemize\n")

     ;; Version 1.2.0 switched to GPLv3+ (from LGPLv3+).
     (license gpl3+))


Quoting Julien Lepiller <julien@lepiller.eu>:

> Le Mon, 27 Jul 2020 13:29:28 -0500,
> mbcladwell@stihie.net a écrit :
>
>>   (inputs
>>   `(("guile" ,guile)))
>
> The variable that contains the latest guile package is not named guile,
> which explains the error you get. Although the package is named "guile"
> (because of its name field), the variable that contains it is guile-3.0,
> so use this instead:
>
>>   (inputs
>>   `(("guile" ,guile-3.0)))
>
> You'll also need pkg-config as a native-inputs, and to import the
> module (gnu packages pkg-config) for the variable to be defined:
>
>>   (native-inputs
>>   `(("pkg-config" ,pkg-config)))
>
> HTH!