diff --git a/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml
index 2be2c66080d1..29973bd401fc 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml
@@ -1088,6 +1088,15 @@ Superuser created successfully.
           but instead use more of the YAML-specific syntax.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          GNOME desktop environment now enables
+          <literal>QGnomePlatform</literal> as the Qt platform theme,
+          which should avoid crashes when opening file chooser dialogs
+          in Qt apps by using XDG desktop portal. Additionally, it will
+          make the apps fit better visually.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
 </section>
diff --git a/nixos/doc/manual/release-notes/rl-2111.section.md b/nixos/doc/manual/release-notes/rl-2111.section.md
index 6db546caba33..c115ee9513df 100644
--- a/nixos/doc/manual/release-notes/rl-2111.section.md
+++ b/nixos/doc/manual/release-notes/rl-2111.section.md
@@ -312,3 +312,5 @@ To be able to access the web UI this port needs to be opened in the firewall.
 - Nginx will use the value of `sslTrustedCertificate` if provided for a virtual host, even if `enableACME` is set. This is useful for providers not using the same certificate to sign OCSP responses and server certificates.
 
 - `lib.formats.yaml`'s `generate` will not generate JSON anymore, but instead use more of the YAML-specific syntax.
+
+- GNOME desktop environment now enables `QGnomePlatform` as the Qt platform theme, which should avoid crashes when opening file chooser dialogs in Qt apps by using XDG desktop portal. Additionally, it will make the apps fit better visually.
diff --git a/nixos/modules/services/x11/desktop-managers/gnome.nix b/nixos/modules/services/x11/desktop-managers/gnome.nix
index b0859321a525..4bc42525906c 100644
--- a/nixos/modules/services/x11/desktop-managers/gnome.nix
+++ b/nixos/modules/services/x11/desktop-managers/gnome.nix
@@ -372,6 +372,13 @@ in
       xdg.portal.enable = true;
       xdg.portal.extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
 
+      # Harmonize Qt5 application style and also make them use the portal for file chooser dialog.
+      qt5 = {
+        enable = mkDefault true;
+        platformTheme = mkDefault "gnome";
+        style = mkDefault "adwaita";
+      };
+
       networking.networkmanager.enable = mkDefault true;
 
       services.xserver.updateDbusEnvironment = true;
diff --git a/pkgs/development/libraries/qgnomeplatform/default.nix b/pkgs/development/libraries/qgnomeplatform/default.nix
index e3bb938f5f8f..bfb1859ba655 100644
--- a/pkgs/development/libraries/qgnomeplatform/default.nix
+++ b/pkgs/development/libraries/qgnomeplatform/default.nix
@@ -2,12 +2,12 @@
 , lib
 , fetchFromGitHub
 , nix-update-script
+, cmake
 , pkg-config
-, gtk3
+, adwaita-qt
 , glib
+, gtk3
 , qtbase
-, qmake
-, qtx11extras
 , pantheon
 , substituteAll
 , gsettings-desktop-schemas
@@ -15,13 +15,13 @@
 
 mkDerivation rec {
   pname = "qgnomeplatform";
-  version = "0.6.1";
+  version = "0.8.0";
 
   src = fetchFromGitHub {
     owner = "FedoraQt";
     repo = "QGnomePlatform";
     rev = version;
-    sha256 = "1mwqg2zk0sfjq54vz2jjahbgi5sxw8rb71h6mgg459wp99mhlqi0";
+    sha256 = "C/n8i5j0UWfxhP10c4j89U+LrpPozXnam4fIPYMXZAA=";
   };
 
   patches = [
@@ -33,24 +33,21 @@ mkDerivation rec {
   ];
 
   nativeBuildInputs = [
+    cmake
     pkg-config
-    qmake
   ];
 
   buildInputs = [
+    adwaita-qt
     glib
     gtk3
     qtbase
-    qtx11extras
   ];
 
-  postPatch = ''
-    # Fix plugin dir
-    substituteInPlace decoration/decoration.pro \
-      --replace "\$\$[QT_INSTALL_PLUGINS]" "$out/$qtPluginPrefix"
-    substituteInPlace theme/theme.pro \
-      --replace "\$\$[QT_INSTALL_PLUGINS]" "$out/$qtPluginPrefix"
-  '';
+  cmakeFlags = [
+    "-DGLIB_SCHEMAS_DIR=${glib.getSchemaPath gsettings-desktop-schemas}"
+    "-DQT_PLUGINS_DIR=${placeholder "out"}/${qtbase.qtPluginPrefix}"
+  ];
 
   passthru = {
     updateScript = nix-update-script {
diff --git a/pkgs/development/libraries/qgnomeplatform/hardcode-gsettings.patch b/pkgs/development/libraries/qgnomeplatform/hardcode-gsettings.patch
index 9b342d7cf832..40f7f98f25c7 100644
--- a/pkgs/development/libraries/qgnomeplatform/hardcode-gsettings.patch
+++ b/pkgs/development/libraries/qgnomeplatform/hardcode-gsettings.patch
@@ -1,13 +1,14 @@
-diff --git a/common/gnomehintssettings.cpp b/common/gnomehintssettings.cpp
-index 9860e57..40fa6ec 100644
---- a/common/gnomehintssettings.cpp
-+++ b/common/gnomehintssettings.cpp
-@@ -80,9 +80,17 @@ void gtkMessageHandler(const gchar *log_domain,
- GnomeHintsSettings::GnomeHintsSettings()
-     : QObject(0)
+diff --git a/src/common/gnomesettings.cpp b/src/common/gnomesettings.cpp
+index 717cc9b..ee255ea 100644
+--- a/src/common/gnomesettings.cpp
++++ b/src/common/gnomesettings.cpp
+@@ -150,10 +150,18 @@ GnomeSettingsPrivate::GnomeSettingsPrivate(QObject *parent)
+     : GnomeSettings(parent)
      , m_usePortal(checkUsePortalSupport())
+     , m_canUseFileChooserPortal(!m_usePortal)
 -    , m_gnomeDesktopSettings(g_settings_new("org.gnome.desktop.wm.preferences"))
 -    , m_settings(g_settings_new("org.gnome.desktop.interface"))
+     , m_fallbackFont(new QFont(QLatin1String("Sans"), 10))
  {
 +    g_autoptr(GSettingsSchemaSource) schemaSource = nullptr;
 +    g_autoptr(GSettingsSchema) gnomeDesktopSchema = nullptr;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4a190e5b19c6..baf61f2b9b54 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18510,7 +18510,7 @@ with pkgs;
 
   qrupdate = callPackage ../development/libraries/qrupdate { };
 
-  qgnomeplatform =  libsForQt514.callPackage ../development/libraries/qgnomeplatform { };
+  qgnomeplatform = libsForQt5.callPackage ../development/libraries/qgnomeplatform { };
 
   randomx = callPackage ../development/libraries/randomx { };