networkd-dispatcher: Add patch support store files

pkgs/tools/networking/networkd-dispatcher/default.nix

@@ -19,6 +19,12 @@ stdenv.mkDerivation rec {
     hash = "sha256-yO9/HlUkaQmW/n9N3vboHw//YMzBjxIHA2zAxgZNEv0=";
   };
 
+  patches = [
+    # Support rule files in NixOS store paths. Required for the networkd-dispatcher
+    # module to work
+    ./support_nix_store_path.patch
+  ];
+
   postPatch = ''
     # Fix paths in systemd unit file
     substituteInPlace networkd-dispatcher.service \

pkgs/tools/networking/networkd-dispatcher/support_nix_store_path.patch

@@ -0,0 +1,13 @@
+diff --git a/networkd-dispatcher b/networkd-dispatcher
+index ef877ce..8c341f2 100755
+--- a/networkd-dispatcher
++++ b/networkd-dispatcher
+@@ -171,6 +171,8 @@ def check_perms(path, mode=0o755, uid=0, gid=0):
+ 
+     if not os.path.exists(path):
+         raise FileNotFoundError
++    if re.search('^/nix/store/.*', str(path)):
++        return True
+     st = os.stat(path, follow_symlinks=False)
+     st_mode = st.st_mode & 0x00FFF
+     if st.st_uid == uid and st.st_gid == gid and st_mode == mode: