diff --git a/ksh.spec b/ksh.spec
index 69fedf3..81dd92b 100644
--- a/ksh.spec
+++ b/ksh.spec
@@ -1,6 +1,6 @@
 %define pkg_version %(echo %version | tr . - )
 Name:          ksh
-Version:       2011.02.08
+Version:       2020.0.0
 Release:       1mamba
 Summary:       The Original ATT Korn Shell
 Group:         Applications/Shells
@@ -8,8 +8,9 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://www.kornshell.com/
-Source0:       http://www2.research.att.com/~gsf/download/tgz/ast-ksh.%{pkg_version}.tgz
-Source1:       http://www2.research.att.com/~gsf/download/tgz/INIT.%{pkg_version}.tgz
+Source:        https://github.com/ksh2020/ksh.git/%{version}/ksh-%{version}.tar.bz2
+#Source0:       http://www2.research.att.com/~gsf/download/tgz/ast-ksh.%{pkg_version}.tgz
+#Source1:       http://www2.research.att.com/~gsf/download/tgz/INIT.%{pkg_version}.tgz
 # from fedora
 Source2:       dotkshrc
 Source3:       kshrc.mamba
@@ -33,40 +34,37 @@ AT&T Bell Laboratories.
 Korn Shell is a shell programming language, which is upward compatible
 with "sh" (the Bourne Shell).
 
+%debug_package
+
 %prep
-%setup -q -c %{name}-%{version}
-%setup -q -T -D -a 1
+%setup -q
+#% setup -q -T -D -a 1
 
-%patch0 -p1
-%patch1 -p1
+#%patch0 -p1
+#%patch1 -p1
 
-sed -i 's|ls /dev/fd|ls /proc/self/fd|' src/cmd/ksh93/features/options
+#sed -i 's|ls /dev/fd|ls /proc/self/fd|' src/cmd/ksh93/features/options
 
 %build
-./bin/package
-./bin/package make mamake ||:
-./bin/package make mamake ||:
-export CCFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing"
-export CC=gcc
-./bin/package "make"
+%meson
 
-cp lib/package/LICENSES/ast LICENSE
+%meson_build
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%meson_install
 
-mkdir -p %{buildroot}{/bin,%{_bindir},%{_mandir}/man1}
-install -c -m 755 arch/*/bin/ksh %{buildroot}/bin/ksh
-install -c -m 755 arch/*/bin/shcomp %{buildroot}%{_bindir}/shcomp
-install -c -m 644 arch/*/man/man1/sh.1 %{buildroot}%{_mandir}/man1/ksh.1
 mkdir -p %{buildroot}%{_sysconfdir}/skel
 install -m 644 %{SOURCE2} %{buildroot}%{_sysconfdir}/skel/.kshrc
 install -m 644 %{SOURCE3} %{buildroot}%{_sysconfdir}/kshrc
 
+install -d -m0755 %{buildroot}/bin
+mv %{buildroot}%{_bindir}/ksh %{buildroot}/bin/ksh
+
 %check
 export SHELL=$(ls $(pwd)/arch/*/bin/ksh)
 cd src/cmd/ksh93/tests/
-ulimit -c unlimited
+#ulimit -c unlimited
 if [ ! -e /dev/fd ]
 then
   echo "ERROR: /dev/fd does not exist, regression tests skipped"
@@ -105,9 +103,12 @@ fi
 %config(noreplace) %{_sysconfdir}/kshrc
 /bin/ksh
 %{_bindir}/shcomp
-%{_mandir}/man1/ksh.1.gz
-%doc LICENSE README
+%{_mandir}/man1/ksh.1*
+%doc LICENSE
 
 %changelog
+* Sun Sep 06 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 2020.0.0-1mamba
+- update to 2020.0.0
+
 * Sat Feb 12 2011 gil <puntogil@libero.it> 20110208-1mamba
 - package created by autospec