I'm afraid it appears to be just you :(
Works for me :)
Don't know what you are doing different, my recipe:
mkdir /path/xxx; cd /path/xxx; git clone https://github.com/geany/geany.git; cd geany
./autogen.sh --prefix=/path/xxx; make install; cd ../bin; ./geany -c ../config
That doesn't touch any system dirs (note no sudo needed :)
—
Reply to this email directly or view it on GitHub.