sed: command garbled: rGIT-PERL-HEADER

[Jeffrey Walton <noloader@xxxxxxxxx>]

I'm trying to build Git 2.18 on Solaris 11.3 x86_64.

$ gmake V=1
rm -f git-add--interactive git-add--interactive+ && \
sed -e '1{' \
    -e '        s|#!.*perl|#!/usr/bin/perl|' \
    -e '        rGIT-PERL-HEADER' \
    -e '        G' \
    -e '}' \
    -e 's/@@GIT_VERSION@@/2.18.0/g' \
    git-add--interactive.perl >git-add--interactive+ && \
chmod +x git-add--interactive+ && \
mv git-add--interactive+ git-add--interactive
sed: command garbled:   rGIT-PERL-HEADER
gmake: *** [git-add--interactive] Error 2

And:

$ perl --version

This is perl 5, version 12, subversion 5 (v5.12.5) built for i86pc-solaris-64int
(with 7 registered patches, see perl -V for more detail)

Any ideas how to fix it?

Thanks in advance.