diff --git a/perl.spec b/perl.spec
index ad0b352..2dbf8c5 100644
--- a/perl.spec
+++ b/perl.spec
@@ -28,7 +28,7 @@
 
 Name:          perl
 Version:       5.24.4
-Release:       2mamba
+Release:       3mamba
 Epoch:         2
 Summary:       Practical Extraction and Report Language
 Group:         Development/Libraries/Perl
@@ -70,8 +70,8 @@ Provides:      perl(Carp::Heavy)
 Obsoletes:     perl-Test-Builder-Tester
 Provides:      perl-Archive-Tar
 Obsoletes:     perl-Archive-Tar
-Provides:      perl-Module-Build
-Obsoletes:     perl-Module-Build
+#Provides:      perl-Module-Build
+#Obsoletes:     perl-Module-Build
 Provides:      perl-Pod-Escapes
 Obsoletes:     perl-Pod-Escapes
 Provides:      perl-Pod-Simple
@@ -100,7 +100,6 @@ Provides:      perl-Test-Tester
 Obsoletes:     perl-Test-Tester
 Provides:      perl-Test-Builder-Tester
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/perl-root
 
 %description
 Perl is a high-level programming language with roots in C, sed, awk and shell scripting.
@@ -129,7 +128,6 @@ Perl's hallmarks are practicality and efficiency.
 While it is used to do a lot of different things, Perl's most common applications (and what it excels at) are probably system administration utilities and web programming.
 A large proportion of the CGI scripts on the web are written in Perl.
 You need the perl package installed on your system so that your system can handle Perl scripts.
-
 This is the devel package for perl.
 
 %debug_package
@@ -319,6 +317,9 @@ rm %{_tmppath}/{perl-mainpkg,perl-develpkg}
 %doc Changes README
  
 %changelog
+* Fri Feb 26 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 5.24.4-3mamba
+- remove obsolete for perl-Module-Build
+
 * Sun Jan 31 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 5.24.4-2mamba
 - provide legacy /usr/bin/perl5.24.0 symlink