I've tried to compile manually from source, but it still doesn't works, compiling libnettle.so.7 (https://ftp.gnu.org/gnu/nettle/nettle-3.5.1.tar.gz) manually and copying it to /usr/lib/ solves the problem (at least to me). Just letting it here, maybe try this first before trying to recompile everything.
Maybe using nettle7 package (https://aur.archlinux.org/packages/nettle7/) could be an option, but they're having a key-sign problem.
edit: not recommended
Pinned Comments
rouhannb commented on 2020-04-01 04:31
I decided to try it out for myself, and the same thing is happening to me. I’m not really sure why it’s happening, but my guess is that it has something to do with makepkg. I’ve tried building the AUR package depot-tools-git and I ran into the same problem, but cloning the repository by hand works fine.
I’ll just leave this pinned until the problem goes away: if the package is hanging when downloading depot_tools, run
git clone --bare https://chromium.googlesource.com/chromium/tools/depot_tools.git depot_tools
and rerun makepkg.