libraries/matplotlib: Fix script.

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

1 files changed, 15 insertions, 6 deletions

diff --git a/libraries/matplotlib/README b/libraries/matplotlib/README
index b980be8ab23fc..c7266d9f6d379 100644
--- a/libraries/matplotlib/README
+++ b/libraries/matplotlib/README
@@ -4,11 +4,20 @@ development and web application servers targeting multiple user
 interfaces and hardcopy output formats.  The 'pylab' mode
 of ipython uses matplotlib to emulate matlab graphics.
 
-OPTIONAL DEPENDENCIES: pytest, mock, ffmpeg/avconv, Inkscape
+OPTIONAL DEPENDENCIES: pytest, mock, ffmpeg/avconv, Inkscape,
+                       wxPython3
 
-NOTES: If you want to enable the optional subpackages tests and
+NOTES: The optional wxagg backend is disabled by default because
+       of possible issues related to wxPython versions. If you
+       wish to use this backend install wxPython3 in advance and
+       set DISABLE_WXAGG to "no" when executing the SlackBuild.
+       IMPORTANT: There is some interaction between wxPython and
+                  wxPython3, pay attention to the corresponding
+                  README files.
+
+       If you want to enable the optional subpackages tests and
        toolkits_tests you need to set the variable ENABLE_TESTS
-       to "yes" and make sure that pytest, mock, ffmpeg/avconv
-       and Inkscape are already installed. Besides ffmpeg/avconv
-       are also needed if you wish better support of animation
-       output formats.
+       to "yes" when executing the SlackBuild and make sure that
+       pytest, mock, ffmpeg/avconv and Inkscape are already
+       installed. Besides ffmpeg/avconv are also needed if you
+       wish better support of animation output formats.