Problem with (patches)

[Manolis Ragkousis]

In this part of my code
>         (source (origin
>              (method git-fetch)
>              (uri (git-reference
>                    (url "git://git.savannah.gnu.org/hurd/hurd")
>                    (commit "e77f00db5097d741f27c74c03d194a233f648615")))
>              (sha256
>               (base32
>                "010q5wy88gaw4qfv2vl9pxfma9px8gs6v03ahqksq420v003b6r1"))
>              (patches (list (search-patch "minimal-hurd.patch")))))

as long as I have (patches..) in there I get the error here

http://paste.lisp.org/display/142007/raw

>  In unknown file: ?: 0 [string-length #f]
>  ERROR: In procedure string-length: Wrong type argument in position 1 
> (expecting string): #f

I have added the patch to the gnu-system.am file under patches

>  gnu/packages/patches/mit-krb5-init-fix.patch            \
>  gnu/packages/patches/minimal-hurd.patch            \  <-- this one
>  gnu/packages/patches/mpc123-initialize-ao.patch        \

It should have found it. My whole recipe is here
http://paste.lisp.org/display/142006/raw

I never had this problem in other files, only in hurd.scm file.

Manolis