Posted April 14, 2020
I confirm: it works ! thank you very much for your support.
vv221: There is now a bug report on our issues tracker, a fix should be included in the next ./play.it update: Debian packages building fails with restrictive umask
So my umask is indeed 027 and switching to 022 did the trick.
Just to let you know that doing
> umask 022
> TMP_DIR=./tmp ./aply-shadow-tactics.sh
did not work: I had the cp error