Installing GAP package: Permission denied

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I am trying to install a GAP package into a cloud.sagemath.com project. I have been following this tutorial

http://wiki.sagemath.org/InstallingGa...

When I try to wget the file (into the $SAGE_ROOT/local/gap/latest/pkg) directory, I get a permission denied error. I tried to place the tar.gz file in my home directory and unzip it from there, but I get the same mistake when unzipping. I can't use sudo because I don't know the password. Any help?