If you want to build an experimental version, make a directory say `/some/path` and download and extract the tarball into that directory (creating a `/some/path/geany`) then
``` cd /some/path/geany ./configure --prefix /some/path --enable-gtk3 make install cd ../bin geany -c ../config ```
makes a whole brand new current Geany totally within `/some/path` which won't interfere with your normal system install or your normal settings.
Experiment happy :)