Created attachment 905912 [details]
build.log

Created attachment 905913 [details]
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Created attachment 905914 [details]
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This one is going to be a bit tricky.  The cause of the FTBFS is installed but unpackaged files, specifically a bundled version of gtkdatabox.  klavaro-2.x was a gtk2 app and used the system gtkdatabox, but klavaro-3.x has been ported to gtk3 but gtkdatabox has not released a gtk3 version yet, hence they bundled a version with the apparent intention of unbundling it once a gtk3 gtkdatabox is available.

Now, gtk3 porting is in progress in upstream gtkdatabox git master[1] (and I'm assuming klavaro just bundled a snapshot thereof, since the last commit was prior to the klavaro-3.00 release).  The library, header dir, and pkg-config names have not been made parallel-installable with the gtk2 version, but according to repoquery, klavaro is the only library in Fedora that uses gtkdatabox.

So, AFAICS, the options are:

1) request a bundling exception[2] for gtkdatabox until such time that there is an upstream gtk3-based release thereof, and patch klavaro to not install its bundled version;

2) update gtkdatabox to a snapshot of git master (and hope no one is using the gtk2 version for their own projects) and patch klavaro to use it instead;

3) convince upstream to make the gtk3 version parallel-installable, then make a gtkdatabox3 package from a git snapshot and patch klavaro to use it instead.

I'd be glad to help implement whichever option is agreed upon.

[1] http://sourceforge.net/p/gtkdatabox/git/ci/master/tree/
[2] https://fedoraproject.org/wiki/Packaging:No_Bundled_Libraries

Well, I went back to 2.00 and I think that it will be a good idea to stay there as long gtkdatabox is not updated.