is_nullable: 1
=head2 flake
  data_type: 'text'

  "flake",
  { data_type => "text", is_nullable => 1 },

# Created by DBIx::Class::Schema::Loader v0.07033 @ 2013-06-13 01:54:50
# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:SlEiF8oN6FBK262uSiMKiw

# Created by DBIx::Class::Schema::Loader v0.07049 @ 2019-05-11 00:16:10
# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:XwlJFCJiS0LHsLg2fFqfUg

    my $flakeRef = $jobset->flake;
    if (defined $flakeRef) {
        (my $res, my $json, my $stderr) = captureStdoutStderr(
            600, "nix", "flake", "info", "--tarball-ttl", 0, "--json", "--", $flakeRef);
        die "'nix flake info' returned " . ($res & 127 ? "signal $res" : "exit code " . ($res >> 8))
            . ":\n" . ($stderr ? decode("utf-8", $stderr) : "(no output)\n")
            if $res;
        $flakeRef = decode_json($json)->{'uri'};
    }

    if (defined $prevEval && $prevEval->hash eq $argsHash && !$dryRun && !$jobset->forceeval) {

    if (defined $prevEval && $prevEval->hash eq $argsHash && !$dryRun && !$jobset->forceeval && $prevEval->flake eq $flakeRef) {

    my $jobs = evalJobs($inputInfo, $exprType, $jobset->nixexprinput, $jobset->nixexprpath, $jobset->flake);

    my $jobs = evalJobs($inputInfo, $exprType, $jobset->nixexprinput, $jobset->nixexprpath, $flakeRef);

            , flake => $flakeRef

    flake         text, -- immutable flake reference

alter table JobsetEvals add column flake text;