Following the instructions here for a binary installation on top of a GNU\Linux system I get "Permission denied" when I attempt to authorize substitutes. What permissions should hydra.gnu.org.pub have? How can i correct this issue?
https://www.gnu.org/software/guix/manual/guix.html#Installation

7.To use substitutes from hydra.gnu.org (see Substitutes), authorize them:
# guix archive --authorize < ~root/.guix-profile/share/guix/hydra.gnu.org.pub

This is what happens to me:
[term ~]$ guix archive --authorize < ~root/.guix-profile/share/guix/hydra.gnu.org.pub
bash: /root/.guix-profile/share/guix/hydra.gnu.org.pub: Permission denied

The same thing happens with sudo:
[term ~]$ sudo guix archive --authorize < ~root/.guix-profile/share/guix/hydra.gnu.org.pub
bash: /root/.guix-profile/share/guix/hydra.gnu.org.pub: Permission denied


Respectfully,
Marc