Just in case this would explain: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=698386#117
There is currently an issue with cmake and multi-arch dirs in debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=768877#23 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org