diff --git a/mutter.spec b/mutter.spec
index d4ea51b..ec529fe 100644
--- a/mutter.spec
+++ b/mutter.spec
@@ -1,6 +1,7 @@
-%define majver %(echo %version | cut -d. -f1-2)
+%define majver %(echo %version | cut -d. -f1)
+%define apiver 8
 Name:          mutter
-Version:       3.38.4
+Version:       40.0
 Release:       1mamba
 Summary:       A compositing window manager based on Metacity
 Group:         Graphical Desktop/Libraries/GNOME
@@ -20,10 +21,6 @@ License:       GPL
 BuildRequires: glibc-devel
 BuildRequires: gnome-desktop-devel
 BuildRequires: gsettings-desktop-schemas-devel
-BuildRequires: ldconfig
-BuildRequires: libEGL-devel
-BuildRequires: libGL-devel
-BuildRequires: libGLESv2-devel
 BuildRequires: libICE-devel
 BuildRequires: libSM-devel
 BuildRequires: libX11-devel
@@ -43,14 +40,15 @@ BuildRequires: libcanberra-devel
 BuildRequires: libdrm-devel
 BuildRequires: libfontconfig-devel
 BuildRequires: libfribidi-devel
-BuildRequires: libgbm-devel
 BuildRequires: libgdk-pixbuf-devel
 BuildRequires: libglib-devel
+BuildRequires: libglvnd-devel
 BuildRequires: libgraphene-devel
-BuildRequires: libgtk-devel
+BuildRequires: libgtk3-devel
 BuildRequires: libgudev-devel
 BuildRequires: libinput-devel
 BuildRequires: libjson-glib-devel
+BuildRequires: libmesa-devel
 BuildRequires: libpango-devel
 BuildRequires: libpipewire-devel
 BuildRequires: libstartup-notification-devel
@@ -142,34 +140,31 @@ fi
 
 %files -n lib%{name}
 %defattr(-,root,root)
-%{_libdir}/libmutter-7.so.*
-%dir %{_libdir}/mutter-7
-%{_libdir}/mutter-7/libmutter-*-7.so.*
-%dir %{_libdir}/mutter-7/plugins
-%{_libdir}/mutter-7/plugins/libdefault.so
-%{_libdir}/mutter-7/*.typelib
-%{_libdir}/mutter-7/libmutter-*.so
+%{_libdir}/libmutter-%{apiver}.so.*
+%dir %{_libdir}/mutter-%{apiver}
+%{_libdir}/mutter-%{apiver}/libmutter-*-%{apiver}.so.*
+%dir %{_libdir}/mutter-%{apiver}/plugins
+%{_libdir}/mutter-%{apiver}/plugins/libdefault.so
+%{_libdir}/mutter-%{apiver}/*.typelib
+%{_libdir}/mutter-%{apiver}/libmutter-*.so
 %{_libexecdir}/mutter-restart-helper
 %doc COPYING
 
 %files -n lib%{name}-devel
 %defattr(-,root,root)
-%dir %{_includedir}/mutter-7
-%{_includedir}/mutter-7/*
-%{_libdir}/libmutter-7.so
-%{_libdir}/pkgconfig/libmutter-7.pc
-%{_libdir}/pkgconfig/mutter-clutter-7.pc
-%{_libdir}/pkgconfig/mutter-clutter-x11-7.pc
-%{_libdir}/pkgconfig/mutter-cogl-7.pc
-%{_libdir}/pkgconfig/mutter-cogl-pango-7.pc
-%{_libdir}/mutter-7/*.gir
-%dir %{_libexecdir}/installed-tests/mutter-7
-%{_libexecdir}/installed-tests/mutter-7/*
-%dir %{_datadir}/installed-tests/mutter-7
-%{_datadir}/installed-tests/mutter-7/*.test
-%dir %{_datadir}/mutter-7/tests
-%dir %{_datadir}/mutter-7/tests/stacking
-%{_datadir}/mutter-7/tests/stacking/*
+%dir %{_includedir}/mutter-%{apiver}
+%{_includedir}/mutter-%{apiver}/*
+%{_libdir}/libmutter-%{apiver}.so
+%{_libdir}/mutter-%{apiver}/*.gir
+%dir %{_libexecdir}/installed-tests/mutter-%{apiver}
+%{_libexecdir}/installed-tests/mutter-%{apiver}/*
+%dir %{_datadir}/installed-tests/mutter-%{apiver}
+%{_datadir}/installed-tests/mutter-%{apiver}/*.test
+%dir %{_datadir}/mutter-%{apiver}/tests
+%dir %{_datadir}/mutter-%{apiver}/tests/stacking
+%{_datadir}/mutter-%{apiver}/tests/stacking/*
+%{_libdir}/pkgconfig/libmutter-%{apiver}.pc
+%{_libdir}/pkgconfig/mutter-*%{apiver}.pc
 %doc NEWS
 
 #%files apidocs
@@ -177,6 +172,9 @@ fi
 #%{_datadir}/gtk-doc/html/meta/*
 
 %changelog
+* Tue Apr 27 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 40.0-1mamba
+- update to 40.0
+
 * Wed Mar 17 2021 Automatic Build System <autodist@mambasoft.it> 3.38.4-1mamba
 - automatic version update by autodist