[DRE-maint] Bug#972941: jekyll: complains about missing kramdown-parser-gfm

[ydirson at free.fr]

Package: jekyll
Version: 3.9.0+dfsg-1

Starting to use a new machine and incrementally installing missing packages, I finally
get stuck with this:

$ jekyll serve
Configuration file: /home/yann/perso/blog/floss-cook/_config.yml
            Source: /home/yann/perso/blog/floss-cook
       Destination: /home/yann/perso/blog/floss-cook/_site
 Incremental build: disabled. Enable with --incremental
      Generating... 
       Jekyll Feed: Generating feed for posts
  Dependency Error: Yikes! It looks like you don't have kramdown-parser-gfm or one of its dependencies installed. In order to use Jekyll as currently configured, you'll need to install this gem. The full error message from Ruby is: 'cannot load such file -- kramdown-parser-gfm' If you run into trouble, you can find helpful resources at https://jekyllrb.com/help/! 
  Liquid Exception: kramdown-parser-gfm in /_layouts/default.html
             ERROR: YOUR SITE COULD NOT BE BUILT:
                    ------------------------------------
                    kramdown-parser-gfm


kramdown-parser-gfm has been pulled as a dependency of the jekyll package,
and it seems to load properly enough:

floss-cook (master>)$ irb
irb(main):001:0> require 'kramdown-parser-gfm'
=> true
irb(main):002:0> 


That message seems wrong, right ?  How can we know what the real problem is ?