-- [[Will]]
+> I like making this configurable. I do fear that changing what's included
+> by default could break some existing uses of teximg? That needs to be
+> considered, and either the breakage documented in NEWS, or avoided. Also,
+> if mchem is dropped, I think the suggests on texlive-science in
+> debian/control should probably go? --[[Joey]]
+
diff --git a/IkiWiki/Plugin/teximg.pm b/IkiWiki/Plugin/teximg.pm
index 369c108..8c3379f 100644
--- a/IkiWiki/Plugin/teximg.pm
+ # ensure destination directory exists
+ writefile("$imagedir/$digest.png", $config{destdir}, "") &&
+ (($config{teximg_dvipng} &&
- + system("dvipng -D 120 -bg Transparent -T tight -o $config{destdir}/$imagedir/$digest.png $tmp/$digest.dvi 2> $tmp/$digest.log") == 0
+ + system("dvipng -D 120 -bg Transparent -T tight -o $config{destdir}/$imagedir/$digest.png $tmp/$digest.dvi > $tmp/$digest.log") == 0
+ ) ||
+ (!$config{teximg_dvipng} &&
+ system("dvips -E $tmp/$digest.dvi -o $tmp/$digest.ps 2> $tmp/$digest.log") == 0 &&