diff --git a/lyx.changes b/lyx.changes
index 3de1a2c..6e3334f 100644
--- a/lyx.changes
+++ b/lyx.changes
@@ -13,7 +13,6 @@ Thu Jan 18 21:58:03 UTC 2024 - Cor Blom <cornelis@solcon.nl>
 
 - Update to 2.4.0 RC 1
 - Build for Tumbleweed with Qt 6
-- Swith buildsystem to cmake
 - Remove no longer necessary patches:
   * correct-shebang.patch
   * remove_python_shebang.patch
diff --git a/lyx.spec b/lyx.spec
index 15b4ccc..9963028 100644
--- a/lyx.spec
+++ b/lyx.spec
@@ -32,8 +32,9 @@ Source1:        lyxrc.dist
 Source2:        lyx.keyring
 Source3:        http://ftp.lyx.org/pub/lyx/devel/lyx-2.4/lyx-%{version}.tar.xz.sig
 Source4:        README.SUSE
+BuildRequires:  autoconf
+BuildRequires:  automake
 BuildRequires:  bc
-BuildRequires:  cmake
 BuildRequires:  enchant-devel
 BuildRequires:  fdupes
 BuildRequires:  file-devel
@@ -48,16 +49,16 @@ BuildRequires:  update-desktop-files
 BuildRequires:  zlib-devel
 %if %{with qt6}
 BuildRequires:  qt6-gui-private-devel
-BuildRequires:  cmake(Qt6Concurrent)
-BuildRequires:  cmake(Qt6Core)
-BuildRequires:  cmake(Qt6Core5Compat)
-BuildRequires:  cmake(Qt6DBus)
-BuildRequires:  cmake(Qt6Gui)
-BuildRequires:  cmake(Qt6PrintSupport)
-BuildRequires:  cmake(Qt6Sql)
-BuildRequires:  cmake(Qt6Svg)
-BuildRequires:  cmake(Qt6Widgets)
-BuildRequires:  cmake(Qt6Xml)
+BuildRequires:  pkgconfig(Qt6Concurrent)
+BuildRequires:  pkgconfig(Qt6Core)
+BuildRequires:  pkgconfig(Qt6Core5Compat)
+BuildRequires:  pkgconfig(Qt6DBus)
+BuildRequires:  pkgconfig(Qt6Gui)
+BuildRequires:  pkgconfig(Qt6PrintSupport)
+BuildRequires:  pkgconfig(Qt6Sql)
+BuildRequires:  pkgconfig(Qt6Svg)
+BuildRequires:  pkgconfig(Qt6Widgets)
+BuildRequires:  pkgconfig(Qt6Xml)
 %else
 BuildRequires:  pkgconfig(Qt5Concurrent)
 BuildRequires:  pkgconfig(Qt5Core)
@@ -154,23 +155,22 @@ A collection of Math symbol fonts for LyX.
 
 %build
 TEXMF=%{_datadir}/texmf
-%cmake -DLYX_INSTALL=ON \
-    -DLYX_REQUIRE_SPELLCHECK=ON \
-    -DLYX_ENCHANT=ON \
-    -DLYX_HUNSPELL=ON \
-    -DLYX_RELEASE=ON \
+%configure \
+    --enable-build-type=rel \
+    --without-included-boost \
+    --without-aspell \
+    --with-hunspell \
+    --with-enchant \
 %if %{with qt6}
-    -DLYX_USE_QT=QT6 \
+    --enable-qt6 \
 %else
-    -DLYX_USE_QT=QT5 \
+    --enable-qt5
 %endif
-    -DLYX_PACKAGE_SUFFIX=OFF \
-    -DLYX_PROGRAM_SUFFIX=OFF
-%cmake_build
+make %{?_smp_mflags}
 
 %install
 TEXMF=%{_datadir}/texmf
-%cmake_install TEXMF=$TEXMF
+make install TEXMF=$TEXMF
 %python3_fix_shebang
 
 # some defaults