Docker install continuously failing on Debian 7

I'm trying to install docker on Debian 7, but I am running into the following situation and it isn't covered in their tutorials. Any ideas?

me@computer[04:46:05] ~ $ wget -qO- https://get.docker.com/ | sh
libkmod: ERROR ../libkmod/libkmod.c:554 kmod_search_moddep: could not open moddep file '/lib/modules/3.18.5-x86_64-linode52/modules.dep.bin'
Warning: current kernel is not supported by the linux-image-extra-virtual
 package.  We have no AUFS support.  Consider installing the packages
 linux-image-virtual kernel and linux-image-extra-virtual for AUFS support.
+ sleep 10
+ sudo -E sh -c sleep 3; apt-get update

// bunch of apt-get output...

W: Failed to fetch http://ift.tt/1dpYMbS  404  Not Found

W: Failed to fetch http://ift.tt/1dpYMbU  404  Not Found

W: Failed to fetch http://ift.tt/1dpYJwy  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.