The autotools plugin default to an empty prefix if you install by destdir (which is default), that's quite non standard and can create confusion, is there any reason to not use the upstream default (/usr/local) or the distribution default (/usr)? I hit the issue while packaging gucharmap, the glib schemas got installed in $snap/share but the other schemas coming from the deb parts are in $snap/usr/share, our default wrapper set things to look in $snap/usr/share and it the program was not finding its schemas. Things works after using "configflags: [--prefix=/usr]" but ideally that would be the default