Fails when cpanfile.snapshot exists

[oalders]

See https://github.com/metacpan/github-meets-cpan/runs/5678290649?check_suite_focus=true

Run perl-actions/install-with-cpm@v1
  with:
    cpanfile: cpanfile
    sudo: false
    tests: false
    global: true
    perl: perl
    path: $Config{installsitescript}/cpm
    version: master
/usr/bin/docker exec  d67616a0e164d977e593575a745540d0cffca8f000058471163d080b9980e5fb sh -c "cat /etc/*release | grep ^ID"
/usr/local/bin/perl -MConfig -e print "$Config{installsitescript}/cpm"
/usr/local/bin/cpm::set-output name=Get cpm from https%3A//raw.githubusercontent.com/skaji/cpm/master/cpm::
install_to /usr/local/bin/cpm
do_exec: /usr/local/bin/perl
/usr/local/bin/perl -MFile::Copy=cp -e cp("/__w/_temp/[2](https://github.com/metacpan/github-meets-cpan/runs/5678290649?check_suite_focus=true#step:4:2)52d8f52-b708-4495-8[3](https://github.com/metacpan/github-meets-cpan/runs/5678290649?check_suite_focus=true#step:4:3)08-8c970[5](https://github.com/metacpan/github-meets-cpan/runs/5678290649?check_suite_focus=true#step:4:5)c05ca[7](https://github.com/metacpan/github-meets-cpan/runs/5678290649?check_suite_focus=true#step:4:7)", "/usr/local/bin/cpm"); chmod(0755, "/usr/local/bin/cpm")
cpanfile: cpanfile!
cpanfile: /__w/github-meets-cpan/github-meets-cpan/cpanfile! [resolved]
do_exec: /usr/local/bin/perl
/usr/local/bin/perl /usr/local/bin/cpm install --show-build-log-on-failure -v --no-test -g --cpanfile /__w/github-meets-cpan/github-meets-cpan/cpanfile
To load cpanfile.snapshot, you need to install Carton::Snapshot.
Error: The process '/usr/local/bin/perl' failed with exit code 2

It would be helpful automatically to install Carton::Snapshot in cases where a cpanfile.snapshot exists or to mention in the docs that it's the user's responsibility to do this.