Arch Linux Kernel 3.0 configure error

Error Info
auto/os/linux: line 21: 3.0-ARCH: syntax error: invalid arithmetic
operator (error token is “.0-ARCH”)

version=$((uname -r \ | sed 's/^\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1*256*256+\2*256+\3/'))

ArchLinux Linux Kernel 3.0

[root@doneta nginx-1.0.5]# uname -r
3.0-ARCH

Posted at Nginx Forum:

Hello!

On Mon, Aug 15, 2011 at 11:09:09AM -0400, key wrote:

[root@doneta nginx-1.0.5]# uname -r
3.0-ARCH

Please use the patch from here:

http://trac.nginx.org/nginx/ticket/5

Maxim D.