Pacstrap can't install iptables, even thougn it's already installed

I am trying to install Arch Linux ARM on my Nintendo 3DS and I have a

.conf

file that looks like this:

[options]

HoldPkg     = pacman glibc
Architecture = armv6h
#SigLevel    = Required DatabaseOptional
SigLevel	= Never
LocalFileSigLevel = Optional

[core]
Server = http://mirror.archlinuxarm.org/armv7h/core 

[extra]
Server = http://mirror.archlinuxarm.org/armv7h/extra 

[community]
Server = http://mirror.archlinuxarm.org/armv7h/community 

[alarm]
Server = http://mirror.archlinuxarm.org/armv7h/alarm 

[aur]
Server = http://mirror.archlinuxarm.org/armv7h/aur 

ignore the different architectures And it gives me this error:

error: could not open file /mnt/root/var/cache/pacman/pkg/iptables-1:1.8.10-2-armv7h.pkg.tar.xz.part: Invalid argument
error: failed to setup a download payload for iptables-1:1.8.10-2-armv7h.pkg.tar.xz
warning: failed to retrieve some files
error: failed to commit transaction (failed to retrieve some files)
Errors occurred, no packages were upgraded.
==> ERROR: Failed to install packages to new root

I have tried

directly into the mirror for that specific file, and got a file named

-1_1.8.10-2-armv7h.pkg.tar.xz

, which can't be renamed to

-1:1.8.10-2-armv7h.pkg.tar.xz

, as that is an invalid filename. What should I do?