> > > @@ -38,7 +39,7 @@ scriptsDir="$(dirname "$0")"
> > >  out="$1"
> > >  shift
> > >
> > > -nl=$'\n'
> > > +nl='\n'
> > >  table="label: gpt"
> > >
> > >  # Keep 1MiB free at the start, and 1MiB free at the end.
> > > @@ -51,9 +52,7 @@ done
> > >
> > >  rm -f "$out"
> > >  truncate -s "$gptBytes" "$out"
> > > -sfdisk "$out" <<EOF
> > > -$table
> > > -EOF
> > > +printf "$table" | sfdisk "$out"
> >
> > The heredoc previously used here should be POSIX:
> >
> >   https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_07_04
> >
> > Does it not work in dash?
> >
>
> Heredoc works in dash too, but I couldn't find out how to expand the
> newlines in variable inside heredoc so that it would work in dash.
> Therefore I simply removed the heredoc and used printf instead.

I think the problem there is this one:

  https://www.shellcheck.net/wiki/SC3003 -- In POSIX sh, $'..' is undefined.

So I think we could fix it without introducing an extra printf process,
by changing how we define `nl` to use a literal newline.

The following test script worked for me in dash:

nl='
'
cat <<EOF
foo${nl}bar
EOF