Package: debhelper
Version: 11.5.2
Severity: serious
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/apcupsd.html
...
dh clean --with autoreconf
dh_auto_clean
make V=1 -j16 clean
make[1]: Entering directory '/build/1st/apcupsd-3.14.14'
1find . -depth \
\( -name -o -name -o -name \*.a \) \
-exec " CLEAN" \{\} \; -exec \{\} \;
/bin/sh: 1: 1find: not found
make[1]: *** [autoconf/targets.mak:98: clean] Error 127
https://sources.debian.org/src/apcupsd/3.14.14-2/autoconf/targets.mak/#L98
Using V=1 for getting verbose build output is a relatively
recent convention followed by some software.
It is not something that is safe to use everywhere.