"lastModified": 1580749449,
        "narHash": "sha256-wEPYfs8ULx0dK6R4hrsXC/r8omxJLc86OhQg39eCo0c="

        "lastModified": 1581081721,
        "narHash": "sha256-Axhas6uySMqevQrjdLaIfFQZgyCueBngzUV7CEYhbWI="

            "narHash": "sha256-V4jz8Hbt+mZkXhH+3KmUQcRGETOFd8mVPhgQlS4Lu5E="

            "lastModified": 1580555706,
            "narHash": "sha256-ly5Gxl9yZgW2w1F3aDU5bvg34Ct+juUaOg8vue+Mkbo="

            "rev": "dd45a16733f4469a0dded6ad0bf9a662ea39bdea",

            "rev": "43e283790fbe330b723ac44b584824cf6d85c1ee",

        "rev": "0a4e911cf478d0d38082a8840a5acc8f57d00086",

        "rev": "d2032edb2f86e955a8a7724a27c0c3225f386500",

        "lastModified": 1580555706,
        "narHash": "sha256-ly5Gxl9yZgW2w1F3aDU5bvg34Ct+juUaOg8vue+Mkbo="

        "lastModified": 1581348815,
        "narHash": "sha256-ZYGphR59gsdFhtZYDoeuCtULm8ym/qJSHIslih9b1s8="

        "rev": "43e283790fbe330b723ac44b584824cf6d85c1ee",

        "rev": "d959778e0934c4c93896d509a65de798909c7cdd",

=head2 flake
  data_type: 'text'
  is_nullable: 1

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

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

  is_nullable: 1

  is_nullable: 1

  is_nullable: 1

=head2 type
  data_type: 'integer'
  default_value: 0
  is_nullable: 0

=head2 flake
  data_type: 'text'
  is_nullable: 1

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

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

  "type",
  { data_type => "integer", default_value => 0, is_nullable => 0 },
  "flake",
  { data_type => "text", is_nullable => 1 },

  {
    is_deferrable => 0,
    join_type     => "LEFT",
    on_delete     => "NO ACTION",
    on_update     => "NO ACTION",
  },

# Created by DBIx::Class::Schema::Loader v0.07049 @ 2019-05-11 00:03:52
# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:UVG1D59bXaQ1TUEF237tXQ

alter table Jobsets alter column nixExprInput drop not null;
alter table Jobsets alter column nixExprPath drop not null;
alter table Jobsets add column type integer default 0;
alter table Jobsets add column flake text;
alter table Jobsets add check ((type = 0) = (nixExprInput is not null and nixExprPath is not null));
alter table Jobsets add check ((type = 1) = (flake is not null));
alter table JobsetEvals add column flake text;

    nixExprInput  text, -- name of the jobsetInput containing the Nix or Guix expression
    nixExprPath   text, -- relative path of the Nix or Guix expression

    type          integer not null default 0, -- 0 == legacy, 1 == flake
    flake         text,

    check ((type = 0) = (nixExprInput is not null and nixExprPath is not null)),
    check ((type = 1) = (flake is not null)),

    -- build.  FIXME: this should be stored in JobsetEvals, storing it
    -- here is denormal.

    flake         text, -- immutable flake reference