diff --git a/fcitx5-qt.spec b/fcitx5-qt.spec
index 95a4c82..a1308b1 100644
--- a/fcitx5-qt.spec
+++ b/fcitx5-qt.spec
@@ -1,5 +1,12 @@
 %global __provides_exclude_from ^%{_libdir}/(fcitx5|qt5)/.*\\.so$
 
+%ifarch s390x
+# Don't build fcitx5-qt6 for s390x
+%global build_qt6 0
+%else
+%global build_qt6 1
+%endif
+
 Name:           fcitx5-qt
 Version:        5.0.9
 Release:        %autorelease
@@ -21,12 +28,12 @@ BuildRequires:  pkgconfig(Fcitx5Utils)
 BuildRequires:  pkgconfig(Qt5)
 BuildRequires:  pkgconfig(Qt5Core)
 BuildRequires:  pkgconfig(Qt5Gui) 
-BuildRequires:  pkgconfig(Qt6)
-# BuildRequires:  pkgconfig(Qt6Core)
-# BuildRequires:  pkgconfig(Qt6Gui) 
 BuildRequires:  gettext
 BuildRequires:  qt5-qtbase-private-devel
+%if %{build_qt6}
+BuildRequires:  pkgconfig(Qt6)
 BuildRequires:  qt6-qtbase-private-devel
+%endif
 # This needs to be rebuilt on every minor Qt5 version bump
 %{?_qt5:Requires: %{_qt5}%{?_isa} = %{_qt5_version}}
 
@@ -58,6 +65,7 @@ Summary:        Provide libFcitx5Qt5WidgetsAddons for fcitx5
 %description libfcitx5qt5widgets
 This package provides libFcitx5Qt5WidgetsAddons for fcitx5.
 
+%if %{build_qt6}
 %package -n fcitx5-qt6
 Summary:        Qt 6 support for fcitx5
 # This needs to be rebuilt on every minor Qt6 version bump
@@ -65,6 +73,7 @@ Summary:        Qt 6 support for fcitx5
 
 %description -n fcitx5-qt6
 Qt6 library and IM module for fcitx5.
+%endif
 
 %package devel
 Summary:        Development files for %{name}
@@ -80,7 +89,12 @@ Development files for %{name}
 %autosetup -p1
 
 %build
-%cmake -GNinja -DENABLE_QT4=False -DENABLE_QT6=True
+%cmake -GNinja -DENABLE_QT4=False \
+%if %{build_qt6}
+    -DENABLE_QT6=True
+%else
+    -DENABLE_QT6=False
+%endif
 %cmake_build 
 
 %install
@@ -95,19 +109,24 @@ Development files for %{name}
 %{_libexecdir}/fcitx5-qt5-gui-wrapper
 %{_libdir}/fcitx5/qt5/
 
+%if %{build_qt6}
 %files -n fcitx5-qt6
 %{_qt6_plugindir}/platforminputcontexts/libfcitx5platforminputcontextplugin.so
 %{_libdir}/libFcitx5Qt6DBusAddons.so.1
 %{_libdir}/libFcitx5Qt6DBusAddons.so.*.*
+%endif
 
 %files devel
 %{_includedir}/Fcitx5Qt5/
-%{_includedir}/Fcitx5Qt6/
 %{_libdir}/cmake/Fcitx5Qt5*
-%{_libdir}/cmake/Fcitx5Qt6*
 %{_libdir}/libFcitx5Qt5DBusAddons.so
-%{_libdir}/libFcitx5Qt6DBusAddons.so
 %{_libdir}/libFcitx5Qt5WidgetsAddons.so
+%if %{build_qt6}
+%{_libdir}/libFcitx5Qt6DBusAddons.so
+%{_libdir}/cmake/Fcitx5Qt6*
+%{_includedir}/Fcitx5Qt6/
+%endif
+
 
 %files module 
 %{_qt5_plugindir}/platforminputcontexts/libfcitx5platforminputcontextplugin.so