I usually get that error because I can never remember what order the parameters are supposed to be in. 
Anyway, it's easy to check if the link already exists:
chris@debian-vm:~/netsurf/netsurf$ ls -la /usr/bin/nsg*
lrwxrwxrwx 1 root root 26 Feb 29 00:16 /usr/bin/nsgenbind -> /opt/netsurf/bin/nsgenbind
If it shows up as a file (ie. no "->"), delete it and recreate the link.
Thanks again for your help !
I recreated the link, i just modified it to correspond to my configuration (I work with cygwin to compile NetSurf for AmigaOS3), so I have :
ln -s /home/Administrator/netsurf/nsgenbind/build-i686-pc-cygwin-i686-pc-cygwin-release-binary/nsgenbind /usr/bin/nsgenbindI tried to compile the 3.5 release and also with the 3.6 dev and I don't have the duk_dukky.o error anymore (for the 3.6 dev, i have another error, but that's not the topic here).
However, the problem is when I try to launch NetSurf 3.5 on AmiKit V8 now. I obtain this :
FATAL 56: uncaught error
PANIC 56: uncaught error (calling abort)
Abnormal program termination
NetSurf : error code 20I don't have this error with NetSurf 3.5 "dukTape disabled edition". The browser is well working in that case (it is only "not really" beautiful

and the pictures and videos aren't displayed).