diff --git a/README.md b/README.md
index 59d1802234bc191581bf95a4790d63f8491aa5e3..8fde3a3cb4fc3d20f10e1803c920bc52ad84235d 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,8 @@ newer libstdc++. This is not yet implemented.
 
 ### Protecting `$HOME`
 
+(This feature is not being actively developed right now.)
+
 If we change the meaning of `/home` for a game to be a fake
 app-specific directory, then the game can't write random files in unknown
 subdirectories of $HOME, and we can be reasonably sure that uninstalling
@@ -435,11 +437,7 @@ interactive shell).
     - `--steam-app-id=70 --unshare-home` (when running from Steam you can use
     `--steam-app-id=${SteamAppId}`, which is the default)
 
-    Unchecking "Share real home directory" in the GUI launcher is the
-    same as `--unshare-home` on the command-line. It is an error to do
-    this without telling `pressure-vessel-wrap` what to use for the home
-    directory, either via `--fake-home`, `--freedesktop-app-id`,
-    `--steam-app-id`, or having the `SteamAppId` environment variable.
+    This feature is not being actively developed right now.
 
 Steam integration
 -----------------
@@ -548,6 +546,8 @@ increasingly long "adverb" command around the command to be run.
 
 ### Unsharing the home directory
 
+(This feature is not being actively developed right now.)
+
 Each game gets a private home directory in `~/.var/app`, the same as
 Flatpak apps do. The name of the private home directory follows the
 [naming recommendations from the freedesktop.org Desktop Entry
diff --git a/pressure-vessel-test-ui b/pressure-vessel-test-ui
index 7b241e452d48e0ce337075065864f8a6c8cf79be..31bc7ba37a31d7c5962db1850dbc4a24a069023a 100755
--- a/pressure-vessel-test-ui
+++ b/pressure-vessel-test-ui
@@ -43,6 +43,10 @@ from gi.repository import Gtk
 logger = logging.getLogger('pressure-vessel-test-ui')
 
 
+# This doesn't fully work yet. Hack at own risk.
+CAN_UNSHARE_HOME = False
+
+
 class Gui:
     def __init__(self):
         # type: (...) -> None
@@ -104,13 +108,16 @@ class Gui:
 
         row += 1
 
-        self.share_home_check = Gtk.CheckButton.new_with_label(
-            'Share real home directory'
-        )
-        self.share_home_check.set_active(True)
-        self.grid.attach(self.share_home_check, 1, row, 1, 1)
+        if CAN_UNSHARE_HOME:
+            self.share_home_check = Gtk.CheckButton.new_with_label(
+                'Share real home directory'
+            )
+            self.share_home_check.set_active(True)
+            self.grid.attach(self.share_home_check, 1, row, 1, 1)
 
-        row += 1
+            row += 1
+        else:
+            self.share_home_check = None
 
         self.xterm_check = Gtk.CheckButton.new_with_label('Run in an xterm')
         self.xterm_check.set_active(False)
@@ -255,7 +262,7 @@ class Gui:
             argv.append('--runtime')
             argv.append(os.path.join(id, 'files'))
 
-        if self.share_home_check.get_active():
+        if self.share_home_check is None or self.share_home_check.get_active():
             argv.append('--share-home')
         else:
             argv.append('--unshare-home')