diff --git a/libbio2jack.spec b/libbio2jack.spec
index f1f7aed..1d87972 100644
--- a/libbio2jack.spec
+++ b/libbio2jack.spec
@@ -1,11 +1,11 @@
 Name:          libbio2jack
 Version:       0.9
-Release:       2mamba
+Release:       4mamba
 Summary:       A library for porting bio OSS/ALSA audio applications to Jack
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
-Packager:      Davide Madrisan <davide.madrisan@qilinux.it>
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://bio2jack.sourceforge.net/
 Source:        http://downloads.sourceforge.net/sourceforge/bio2jack/bio2jack-%{version}.tar.gz
 License:       GPL
@@ -14,7 +14,6 @@ BuildRequires: glibc-devel
 BuildRequires: libjack-devel
 BuildRequires: libsamplerate-devel
 ## AUTOBUILDREQ-END
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Bio2jack is a library that allows for simple porting of general purposed bio (blocked io) OSS/ALSA audio applications to Jack.
@@ -26,15 +25,20 @@ Requires:      %{name} = %{version}
 
 %description devel
 Bio2jack is a library that allows for simple porting of general purposed bio (blocked io) OSS/ALSA audio applications to Jack.
+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 -n bio2jack
+./autogen.sh
 
 %build
-./autogen.sh
 %configure
+
+# Remove prebuilt library in archive
+make clean
+
 %make
 
 %install
@@ -49,18 +53,25 @@ This package contains static libraries and header files need for development.
 
 %files
 %defattr(-,root,root)
-%{_libdir}/*.so.*
-%doc AUTHORS COPYING ChangeLog INSTALL NEWS README
+%{_libdir}/libbio2jack.so.*
+%doc AUTHORS COPYING
 
 %files devel
 %defattr(-,root,root)
 %{_bindir}/bio2jack-config
 %{_includedir}/*.h
-%{_libdir}/*.a
-%{_libdir}/*.la
-%{_libdir}/*.so
+%{_libdir}/libbio2jack.a
+%{_libdir}/libbio2jack.la
+%{_libdir}/libbio2jack.so
+%doc ChangeLog INSTALL NEWS README
 
 %changelog
+* Tue Jan 04 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.9-4mamba
+- fix using prebuilt binaries in archive
+
+* Tue Jan 04 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.9-3mamba
+- rebuilt with debug package and specfile fixes
+
 * Sun Aug 18 2013 Automatic Build System <autodist@mambasoft.it> 0.9-2mamba
 - automatic rebuild by autodist