git clone --recursive fails

[galou]

When trying to git clone --recursive this repo I got

Cloning into 'inkscape-svg2fcsketch'...
remote: Enumerating objects: 31, done.
remote: Counting objects: 100% (31/31), done.
remote: Compressing objects: 100% (23/23), done.
remote: Total 194 (delta 11), reused 24 (delta 8), pack-reused 163
Receiving objects: 100% (194/194), 602.13 KiB | 0 bytes/s, done.
Resolving deltas: 100% (91/91), done.
Checking connectivity... done.
Submodule 'inksvg' (git://github.com/jnweiger/inkscape-thunderlaser.git) registered for path 'inksvg'
Cloning into 'inksvg'...
remote: Enumerating objects: 585, done.
remote: Total 585 (delta 0), reused 0 (delta 0), pack-reused 585
Receiving objects: 100% (585/585), 897.30 KiB | 515.00 KiB/s, done.
Resolving deltas: 100% (404/404), done.
Checking connectivity... done.
Submodule path 'inksvg': checked out '79f3b8dab4177b81810c0c35683fdecfbe3492c0'
Submodule 'src/ruida' (git@github.com:jnweiger/ruida-laser.git) registered for path 'src/ruida'
Cloning into 'src/ruida'...
Warning: Permanently added the RSA host key for IP address '192.30.253.113' to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'git@github.com:jnweiger/ruida-laser.git' into submodule path 'src/ruida' failed
Failed to recurse into submodule path 'inksvg'

I installed by symlinking inkscape-svg2fcsketch.{inx,py} and it seems to work by just without ruida-laser. Thanks for the great work!

Gaël