No Guile development packages were found.

[mbcladwell@stihie.net]

Hi,
I would like to upgrade guile-json in my local store.
I start with
$guix pull
$guix package -u  (didn't do anything)

Modifying the template at  
https://guix.gnu.org/blog/2018/a-packaging-tutorial-for-guix/
I create the file guile-json.scm:

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

(package
   (name "guile-json")
   (version "4.3.2")
   (source (origin
             (method url-fetch)
             (uri (string-append  
"https://download.savannah.gnu.org/releases/guile-json/guile-json-"  
version  ".tar.gz"))
             (sha256
              (base32
               "0255c7f053z4p9mqzhpxwbfx3y47j9nfvlgnm8xasdclyzmjl9y2"))))
   (build-system gnu-build-system)
   (synopsis "Hello, Guix world: An example custom Guix package")
   (description
    "GNU Hello prints the message \"Hello, world!\" and then exits.  It
serves as an example of standard GNU coding practices.  As such, it supports
command-line arguments, multiple languages, and so on.")
   (home-page "https://www.gnu.org/software/hello/")
   (license gpl3+))


Then I run:

$guix package --install-from-file=./Downloads/guile-json/guile-json.scm
guix package: warning: Consider running 'guix pull' followed by
'guix package -u' to get up-to-date packages and security updates.

The following package will be upgraded:
    guile-json 3.2.0 → 4.3.2

The following derivations will be built:
    /gnu/store/advvlsn24m0jc84ivqsfrd9y9bicfsan-profile.drv
    /gnu/store/w58xzy3xz0xf4ljr84k9q35kyriapvq6-guile-json-4.3.2.drv
The following profile hooks will be built:
    /gnu/store/3z61qjph0ww2bizg904vmqn6p5cwgcyq-fonts-dir.drv
    /gnu/store/9nnjb0y55hb5ai9ss3zrljyx6npxqjip-ca-certificate-bundle.drv
    /gnu/store/jmris7xjszh69gci0mpxw76isrirb9dk-info-dir.drv
    /gnu/store/yyp1p3mpsz5azfl59sdlncr0zcscj6qx-manual-database.drv
building /gnu/store/w58xzy3xz0xf4ljr84k9q35kyriapvq6-guile-json-4.3.2.drv...
| 'configure' phasebuilder for  
`/gnu/store/w58xzy3xz0xf4ljr84k9q35kyriapvq6-guile-json-4.3.2.drv'  
failed with exit code 1
build of  
/gnu/store/w58xzy3xz0xf4ljr84k9q35kyriapvq6-guile-json-4.3.2.drv failed
View build log at  
'/var/log/guix/drvs/w5/8xzy3xz0xf4ljr84k9q35kyriapvq6-guile-json-4.3.2.drv.bz2'.
cannot build derivation  
`/gnu/store/advvlsn24m0jc84ivqsfrd9y9bicfsan-profile.drv': 1  
dependencies couldn't be built
guix package: error: build of  
`/gnu/store/advvlsn24m0jc84ivqsfrd9y9bicfsan-profile.drv' failed


Looking at the log file, the final lines are:

checking for pkg-config... no
configure: checking for guile 3.0
configure: checking for guile 2.2
configure: checking for guile 2.0
configure: error:
No Guile development packages were found.

Please verify that you have Guile installed.  If you installed Guile
from a binary distribution, please verify that you have also installed
the development packages.  If you installed it yourself, you might need
to adjust your PKG_CONFIG_PATH; see the pkg-config man page for more.

command  
"/gnu/store/29jhbbg1hf557x8j53f9sxd9imlmf02a-bash-minimal-5.0.7/bin/bash"  
"./configure" "CONFIG_SHELL=/gnu/store/29jhbbg1hf55$


I am on Debian 9 working with guile v 2.2.7, dev files are installed:

apt-get install guile-2.0-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
guile-2.0-dev is already the newest version (2.0.13+1-4).

In my .bashrc I set the variable such that at the terminal prompt:

echo $PKG_CONFIG_PATH
/home/mbc/.guix-profile/lib/pkgconfig

Where did I go wrong?
Thanks
Mortimer