"Can't open perl script "t/spec/fudgeall": No existe el archivo o el directorio"

I am trying to run some tests for Rakudo following instructions in the README.md, that is, with perl Configure.pl and make. However, when I run

make t/02-rakudo/09-thread-id-after-await.t 

after that, it writes:

/home/jmerelo/perl5/perlbrew/perls/perl-5.20.0/bin/perl tools/build/check-nqp-version.pl /home/jmerelo/Code/forks/perl6/rakudo/install/bin/nqp-m
rm -f -- perl6
cp -- perl6-m perl6
chmod -- 755 perl6
/home/jmerelo/perl5/perlbrew/perls/perl-5.20.0/bin/perl t/harness5 --fudge --moar --keep-exit-code --verbosity=1 t/02-rakudo/09-thread-id-after-await.t
Can't open perl script "t/spec/fudgeall": No existe el archivo o el directorio
Files=0, Tests=0,  0 wallclock secs ( 0.01 usr +  0.00 sys =  0.01 CPU)
Result: NOTESTS

That directory does not even exist. Any idea?