diff --git a/libmpcdec.spec b/libmpcdec.spec
index 8cd615c..2c71f7d 100644
--- a/libmpcdec.spec
+++ b/libmpcdec.spec
@@ -1,18 +1,17 @@
 Name:          libmpcdec
 Version:       1.2.6
-Release:       3mamba
+Release:       4mamba
 Summary:       Musepack is an audio compression format with a strong emphasis on high quality
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
-Packager:      Davide Madrisan <davide.madrisan@qilinux.it>
-URL:           http://www.musepack.net/
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://www.musepack.net/
 Source:        http://files.musepack.net/source/libmpcdec-%{version}.tar.bz2
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Musepack is an audio compression format with a strong emphasis on high quality.
@@ -21,19 +20,21 @@ It's not lossless, but it is designed for transparency, so that you won't be abl
 %package devel
 Group:         Development/Libraries
 Summary:       Static libraries and headers for %{name}
-Requires:      %{name} = %{version}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 
 %description devel
 Musepack is an audio compression format with a strong emphasis on high quality.
 It's not lossless, but it is designed for transparency, so that you won't be able to hear differences between the original wave file and the much smaller MPC file. It is based on the MPEG-1 Layer-2 / MP2 algorithms, but since 1997 it has rapidly developed and vastly improved and is now at an advanced stage in which it contains heavily optimized and patentless code.
+This package contains static libraries and header files needed for development.
 
-This package contains static libraries and header files need for development.
+%debug_package
 
 %prep
 %setup -q
 
 %build
 %configure
+
 %make LDFLAGS="-Wl,-soname,libmpcdec.so.5"
 
 %install
@@ -48,18 +49,22 @@ This package contains static libraries and header files need for development.
 
 %files
 %defattr(-,root,root)
-%{_libdir}/*.so.*
+%{_libdir}/libmpcdec.so.*
 %doc AUTHORS COPYING
 
 %files devel
 %defattr(-,root,root)
+%dir %{_includedir}/mpcdec
 %{_includedir}/mpcdec/*.h
-%{_libdir}/*.a
-%{_libdir}/*.la
-%{_libdir}/*.so
+%{_libdir}/libmpcdec.a
+%{_libdir}/libmpcdec.la
+%{_libdir}/libmpcdec.so
 %doc ChangeLog INSTALL README
 
 %changelog
+* Tue Jan 04 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 1.2.6-4mamba
+- rebuilt with debug package and specfile fixes
+
 * Sat Nov 30 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 1.2.6-3mamba
 - add LDFLAGS to build with correct SONAME