Ludovic Courtès <ludo@gnu.org> writes:

> Hi,
>
> 宋文武 <iyzsong@outlook.com> skribis:
>
>> Running:
>>   guix build u-boot-pinebook \
>>     --with-git-url=u-boot-pinebook=https://github.com/u-boot/u-boot
>>
>> Would fail with "fatal error: asm/string.h: No such file or directory".
>>
>> And it's caused by the first entry in C_INCLUDE_PATH, which is
>> "/gnu/store/xxx-u-boot-xxx/include".
>
> Why don’t we have that problem when omitting ‘--with-git-url’?

When not use git, source is a tarball, not a directory, so it's ignored
by "set-paths".

>
>> I think we should filter out "source" in `set-paths` of the
>> `gnu-build-system`.
>
> Yes, sounds like a good idea.  We can do it in ‘core-updates’.

Here is patch: