Weird 'undefined variable' error of a defined variable

pasqui23 · June 28, 2019, 4:21pm

pasqui23/nixpkgs/blob/81fc8b89e8ad0225e04335b410bc01ffd45a4ff0/nixos/modules/programs/firejail.nix#L67


      
                      cp ${p} $out
                    '') cfg.wrappedPackages}
                    ln -s {,$out}${firejail}
                    chroot $out firecfg
                    rm $out${firejail}
                    rm -rf $out/nix/store
                  '';
                };
              in
                optional ([]!=cfg.wrappedBinaries) wrappedBins ++
                optional ([]!=cfg.wrappedPackages) wrappedPkgs;
            };
          
          
  meta.maintainers = with maintainers; [ peterhoeg ];
          }

When I try to build with the new programs.firejail.wrappedPackages I get

building Nix...
building the system configuration...
error: undefined variable 'wrappedPkgs' at ~/src/nixpkgs/nixos/modules/programs/firejail.nix:67:42
(use '--show-trace' to show detailed location information)

even through said variable should be defined

lilyball · June 30, 2019, 4:40am

wrappedPkgs was defined as an attribute of wrappedBins instead of as a let binding.