I really must try and wait a bit before I ask dumb questions. I found out the answer a few minutes after posting.
[bloodaxe@longship ~]$ yaourt -G wmcpu
==> Download wmcpu sources
[bloodaxe@longship ~]$ w.g.e.t http://www.dockapps.org/download.php/id/673/wmcpu-1.4.tar.gz
--2012-03-03 17:41:38-- http://www.dockapps.org/download.php/id/673/wmcpu-1.4.tar.gz
Resolving www.dockapps.org... 22.214.171.124
Connecting to www.dockapps.org|126.96.36.199|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: `wmcpu-1.4.tar.gz'
[ <=> ] 35,802 127K/s in 0.3s
2012-03-03 17:41:39 (127 KB/s) - `wmcpu-1.4.tar.gz' saved 
[bloodaxe@longship ~]$ cd wmcpu/
[bloodaxe@longship wmcpu]$ md5sum wmcpu-1.4.tar.gz
[bloodaxe@longship wmcpu]$ makepkg
==> Making package: wmcpu 1.4-1 (Sat Mar 3 17:46:02 GMT 2012)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
-> Found wmcpu-1.4.tar.gz
-> Found makefile.patch
==> Validating source files with md5sums...
wmcpu-1.4.tar.gz ... Passed
makefile.patch ... Passed
==> Extracting Sources...
==> Entering fakeroot environment...
==> Starting build()...
/home/bloodaxe/wmcpu/PKGBUILD: line 18: cd: /home/bloodaxe/wmcpu/src/wmcpu-1.4:No such file or directory
==> ERROR: A failure occurred in build().
Is my abort caused by me not being in root.?? I did not want to try befote asking as I do not want to bork me new install just yet
Looks like I got me answer
==> ERROR: Running makepkg as root is a BAD idea and can cause permanent,
catastrophic damage to your system. If you wish to run as root, please
use the --asroot option.
naughty naughty barbarian
Hmm the source address is a dead link.
However I have another idea.
Edited by abarbarian, 03 March 2012 - 06:24 PM.