Patch to enable test `protonvpn-nm-lib`. Currently, it fails because it needs to use DBus and can't be found in Nix sandbox. Credits to @NKJe for providing the patches at https://github.com/NixOS/nixpkgs/pull/129333

binary-paths.patch

--- a/protonvpn_nm_lib/core/subprocess_wrapper.py
+++ b/protonvpn_nm_lib/core/subprocess_wrapper.py
@@ -44,11 +44,9 @@
         binary_short_name => full secure path.
         """
         # Look for root-owned directories in the system path in order
-        for path in os.environ.get('PATH', '').split(os.path.pathsep):
+        for path in "@path@".split(os.path.pathsep):
             if not os.path.isdir(path):
                 continue
-            if not self.is_root_owned(path):
-                continue

             # Check for all the binaries that we haven't matched yet
             for binary in self._acceptable_binaries.difference(
@@ -58,9 +56,6 @@
                 if not os.path.isfile(binary_path_candidate):
                     continue

-                if not self.is_root_owned(binary_path_candidate):
-                    continue
-
                 # We're happy with that one, store it
                 self._path_to_binaries[binary] = binary_path_candidate

default.nix

{ lib
, buildPythonPackage
, fetchFromGitHub
, pythonOlder
, substituteAll
, distro
, jinja2
, keyring
, proton-client
, pygobject3
, pyxdg
, systemd
, networkmanager
, ncurses
, systemd-pkg
, xdg-utils
}:

buildPythonPackage rec {
  pname = "protonvpn-nm-lib";
  version = "3.9.0";
  disabled = pythonOlder "3.7";

  src = fetchFromGitHub {
    owner = "ProtonVPN";
    repo = pname;
    rev = version;
    sha256 = "sha256-yV3xeIyPc2DJj5DOa5PA1MHt00bjJ/Y9zZK77s/XRAA=";
  };

  propagatedBuildInputs = [
    distro
    jinja2
    keyring
    proton-client
    pygobject3
    pyxdg
    systemd
  ];
  
  checkInputs = [
    ncurses
    networkmanager
    systemd-pkg
    xdg-utils
  ];

  patches = [
    (substituteAll {
      src = ./0001-Patching-GIRepository.patch;
      networkmanager_path = "${networkmanager}/lib/girepository-1.0";
    })
    (substituteAll {
      src = ./binary-paths.patch;
      path = lib.makeBinPath checkInputs;
    })
  ];

  # Checks cannot be run in the sandbox
  # "Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory"
  #doCheck = false;

  pythonImportsCheck = [ "protonvpn_nm_lib" ];

  meta = with lib; {
    description = "ProtonVPN NetworkManager Library intended for every ProtonVPN service user";
    homepage = "https://github.com/ProtonVPN/protonvpn-nm-lib";
    license = licenses.gpl3Only;
    maintainers = with maintainers; [ wolfangaukang ];
    platforms = platforms.linux;
  };
}

python-packages-snippet.nix

protonvpn-nm-lib = callPackage ../development/python-modules/protonvpn-nm-lib {
  systemd-pkg = pkgs.systemd
};