diff --git a/README.md b/README.md
index d999819..e545af5 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
 # ccache
 
 ccache is a compiler cache. It acts as a caching pre-processor to C/C++ compilers, using the -E compiler switch and a hash to detect when a compilation can be satisfied from cache. This often results in a 5 to 10 times speedup in common compilations.
-
diff --git a/ccache.spec b/ccache.spec
index 03ebd19..7f42f38 100644
--- a/ccache.spec
+++ b/ccache.spec
@@ -1,5 +1,5 @@
 Name:          ccache
-Version:       4.2
+Version:       4.2.1
 Release:       1mamba
 Summary:       A compiler cache that often boosts from 5 to 10 times speedup in common compilations.
 Group:         Development/Tools
@@ -8,29 +8,34 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://ccache.samba.org
 Source:        https://github.com/ccache/ccache.git/v%{version}/ccache-%{version}.tar.bz2
-#Source:        http://samba.org/ftp/ccache/ccache-%{version}.tar.xz
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: libz-devel
+BuildRequires: libgcc
+BuildRequires: libstdc++6-devel
+BuildRequires: libzstd-devel
 ## AUTOBUILDREQ-END
 BuildRequires: asciidoc
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 ccache is a compiler cache. It acts as a caching pre-processor to C/C++ compilers, using the -E compiler switch and a hash to detect when a compilation can be satisfied from cache. This often results in a 5 to 10 times speedup in common compilations.
 
-%debug_package
+#% debug_package
 
 %prep
 %setup -q
 
 %build
-%cmake -d build
+%cmake -d build \
+\
+%ifarch %{ix86}
+   -DUSE_FASTER_LINKER=OFF
+%endif
 
 %make
 
 %install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 %makeinstall -C build
 
 %clean
@@ -40,8 +45,12 @@ ccache is a compiler cache. It acts as a caching pre-processor to C/C++ compiler
 %defattr(-,root,root)
 %{_bindir}/ccache
 %{_mandir}/*
+%doc GPL-3.0.txt
 
 %changelog
+* Tue Mar 30 2021 Automatic Build System <autodist@mambasoft.it> 4.2.1-1mamba
+- automatic version update by autodist
+
 * Thu Feb 04 2021 Automatic Build System <autodist@mambasoft.it> 4.2-1mamba
 - automatic version update by autodist