Add gcovr and disable unreachable packages
Due to LRDE being down, some packages had to be temporarily removed.
As for postman, is seems that the package is no longer supported on NixOS : https://github.com/NixOS/nixpkgs/issues/259147
Due to LRDE being down, some packages had to be temporarily removed.
As for postman, is seems that the package is no longer supported on NixOS : https://github.com/NixOS/nixpkgs/issues/259147