nix-helpers: 949b34ca7b7c9d5cbacbe91dac921f727a286f07

     1: { die, dummyBuild, backportOverlays, repo1603 }:
     2: 
     3: {
     4:   self1603 = with rec {
     5:     repo = backportOverlays {
     6:       name = "backport-overlays-1603-test";
     7:       repo = repo1603;
     8:     };
     9: 
    10:     got =
    11:       import repo { overlays = [ (self: super: { inherit dummyBuild; }) ]; };
    12:   };
    13:     assert got ? dummyBuild || die {
    14:       error = ''
    15:         Backporting overlays to nixpkgs 16.03 didn't produce a set containing
    16:         dummyBuild.
    17:       '';
    18:     };
    19:     got.dummyBuild "backport-overlays-nixpkgs1603";
    20: }