pkgs/development/libraries/glib/schema-override-variable.patch

   1 diff --git a/gio/gsettingsschema.c b/gio/gsettingsschema.c
   2 index 1282c10a1..feadfe3aa 100644
   3 --- a/gio/gsettingsschema.c
   4 +++ b/gio/gsettingsschema.c
   5 @@ -360,6 +360,9 @@ initialise_schema_sources (void)
   6
   7        try_prepend_data_dir (g_get_user_data_dir ());
   8
   9 +      if (!is_setuid && (path = g_getenv ("NIX_GSETTINGS_OVERRIDES_DIR")) != NULL)
  10 +        try_prepend_dir (path);
  11 +
  12        /* Disallow loading extra schemas if running as setuid, as that could
  13         * allow reading privileged files. */
  14        if (!is_setuid && (path = g_getenv ("GSETTINGS_SCHEMA_DIR")) != NULL)