diff --git a/iso/common.nix b/iso/common.nix
index 4e64ad4..d517331 100644
--- a/iso/common.nix
+++ b/iso/common.nix
@@ -6,8 +6,10 @@ let
   pythonEnv = pkgs.python3.withPackages (ps: [ ps.pygobject3 ]);
 
   installerPy = pkgs.writeShellScriptBin "sovran-install" ''
-    export GI_TYPELIB_PATH=${pkgs.gtk4}/lib/girepository-1.0:${pkgs.libadwaita}/lib/girepository-1.0:${pkgs.glib}/lib/girepository-1.0:${pkgs.pango}/lib/girepository-1.0:${pkgs.gdk-pixbuf}/lib/girepository-1.0:${pkgs.graphene}/lib/girepository-1.0:${pkgs.cairo}/lib/girepository-1.0:${pkgs.harfbuzz}/lib/girepository-1.0
+    export GI_TYPELIB_PATH=${pkgs.gtk4}/lib/girepository-1.0:${pkgs.libadwaita}/lib/girepository-1.0:${pkgs.glib}/lib/girepository-1.0:${pkgs.pango}/lib/girepository-1.0:${pkgs.gdk-pixbuf}/lib/girepository-1.0:${pkgs.graphene}/lib/girepository-1.0:${pkgs.cairo}/lib/girepository-1.0:${pkgs.harfbuzz}/lib/girepository-1.0:${pkgs.gobject-introspection}/lib/girepository-1.0
     export LD_LIBRARY_PATH=${pkgs.gtk4}/lib:${pkgs.libadwaita}/lib:${pkgs.glib}/lib:${pkgs.pango}/lib:${pkgs.gdk-pixbuf}/lib:${pkgs.graphene}/lib:${pkgs.cairo}/lib:${pkgs.harfbuzz}/lib
+    export GDK_PIXBUF_MODULE_FILE="${pkgs.gdk-pixbuf}/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"
+    export XDG_DATA_DIRS="${pkgs.gsettings-desktop-schemas}/share/gsettings-schemas/${pkgs.gsettings-desktop-schemas.name}:${pkgs.gtk4}/share:${pkgs.libadwaita}/share:${pkgs.adwaita-icon-theme}/share:${pkgs.hicolor-icon-theme}/share:$XDG_DATA_DIRS"
     exec ${pythonEnv}/bin/python3 /etc/sovran/installer.py
   '';
 in
@@ -34,7 +36,7 @@ in
   services.displayManager.autoLogin.enable = true;
   services.displayManager.autoLogin.user = lib.mkForce "free";
 
-  nix-bitcoin.generateSecrets = true;
+  nix-bitcoin.generateSecrets = lib.mkDefault true;
 
   environment.systemPackages = with pkgs; [
     installerPy
@@ -48,6 +50,8 @@ in
     graphene
     cairo
     harfbuzz
+    gsettings-desktop-schemas
+    adwaita-icon-theme
     util-linux
     disko
     parted
diff --git a/iso/installer.py b/iso/installer.py
index 625da05..bf96e0b 100644
--- a/iso/installer.py
+++ b/iso/installer.py
@@ -2,20 +2,29 @@
 import gi
 gi.require_version("Gtk", "4.0")
 gi.require_version("Adw", "1")
-from gi.repository import Gtk, Adw, GLib, Pango, GdkPixbuf, Gio
-import subprocess
-import threading
+from gi.repository import Gtk, Adw, GLib
+import atexit
 import os
+import subprocess
+import sys
+import threading
 
 LOGO = "/etc/sovran/logo.png"
 LOG = "/tmp/sovran-install.log"
 FLAKE = "/etc/sovran/flake"
 
-logfile = open(LOG, "a")
+try:
+    logfile = open(LOG, "a")
+    atexit.register(logfile.close)
+except OSError:
+    logfile = None
 
 def log(msg):
-    logfile.write(msg + "\n")
-    logfile.flush()
+    if logfile is not None:
+        logfile.write(msg + "\n")
+        logfile.flush()
+    else:
+        print(msg, file=sys.stderr)
 
 def run(cmd):
     log(f"$ {' '.join(cmd)}")
@@ -347,11 +356,10 @@ class InstallerWindow(Adw.ApplicationWindow):
 
     def on_confirm_next(self, btn):
         if self._confirm_entry.get_text().strip() != "ERASE":
-            dlg = Adw.MessageDialog(
-                transient_for=self,
-                heading="Confirmation Required",
-                body="You must type ERASE exactly to proceed."
-            )
+            dlg = Adw.MessageDialog()
+            dlg.set_transient_for(self)
+            dlg.set_heading("Confirmation Required")
+            dlg.set_body("You must type ERASE exactly to proceed.")
             dlg.add_response("ok", "OK")
             dlg.present()
             return