nix-helpers: 88e13f3c79c2080297539629fe4f603f490a7370

     1: { die, nothing, pinnedNixpkgs }:
     2: 
     3: {
     4:   # One reason to use old nixpkgs versions is for useful but obsolete KDE apps
     5:   canAccessKde = assert pinnedNixpkgs.nixpkgs1603 ? kde4
     6:     || die { error = "nixpkgs1603 doesn't have 'kde4' attribute"; };
     7:     assert pinnedNixpkgs.nixpkgs1603.callPackage ({ kde4 ? null }: kde4 != null)
     8:       { } || die {
     9:         error = "nixpkgs1603.callPackage should populate 'kde4' argument";
    10:       };
    11:     nothing;
    12: }