Error compiling Git in current master branch

> Just to let you know, I get the following error compiling Git in master
> branch:
> 
> $ make prefix=/usr NO_GETTEXT=YesPlease all doc info
> ...
>      GEN git-remote-testgit
>      GEN perl/build/man/man3/Git.3pm
> Can't write-open perl/build/man/man3/Git.3pm: Permission denied at 
> /usr/bin/pod2man line 70.
> Makefile:2317: fallo en las instrucciones para el objetivo 
> 'perl/build/man/man3/Git.3pm'
> make: *** [perl/build/man/man3/Git.3pm] Error 13
> 
> This didn't happen in v2.16.2. Doing a git-bisect I've got the following
> culprit:
> 
> $ git bisect start HEAD v2.16.2 --
> 2530afd3519a34b66e72cc29e7751d650cedc6dd is the first bad commit

> make clean fails too:
> 
> rm -f -r perl/build/
> rm: no se puede borrar 'perl/build/man/man3/Git.3pm': Permiso denegado
> Makefile:2734: fallo en las instrucciones para el objetivo 'clean'
> make: *** [clean] Error 1

>> Just to let you know, I get the following error compiling Git in master
>> branch:
>>
>> $ make prefix=/usr NO_GETTEXT=YesPlease all doc info
>> ...
>>       GEN git-remote-testgit
>>       GEN perl/build/man/man3/Git.3pm
>> Can't write-open perl/build/man/man3/Git.3pm: Permission denied at
>> /usr/bin/pod2man line 70.
>> Makefile:2317: fallo en las instrucciones para el objetivo
>> 'perl/build/man/man3/Git.3pm'
>> make: *** [perl/build/man/man3/Git.3pm] Error 13
>>
>> This didn't happen in v2.16.2. Doing a git-bisect I've got the following
>> culprit:
>>
>> $ git bisect start HEAD v2.16.2 --
>> 2530afd3519a34b66e72cc29e7751d650cedc6dd is the first bad commit
> That's not the culprit, that's the fix :)
>
>> make clean fails too:
>>
>> rm -f -r perl/build/
>> rm: no se puede borrar 'perl/build/man/man3/Git.3pm': Permiso denegado
>> Makefile:2734: fallo en las instrucciones para el objetivo 'clean'
>> make: *** [clean] Error 1
> Have a look at the permissions of 'perl/build' and its contents, they
> are likely owned by root for reasons described in 2530afd's log
> message.
>