diff --git a/rustc.spec b/rustc.spec
index e9f276e..651e285 100644
--- a/rustc.spec
+++ b/rustc.spec
@@ -1,6 +1,6 @@
 %define stage1 1
 Name:          rustc
-Version:       1.50.0
+Version:       1.51.0
 Release:       1mamba
 Summary:       The Rust programming language, designed to be a safe, concurrent, practical language
 Group:         Applications/Development
@@ -45,7 +45,8 @@ This package contains the documentation for %{name}.
 %debug_package
 
 %prep
-%setup -q -n %{name}-%{version}-src
+%setup -q -n %{name}-%{version}-src -D -T
+:<< _EOF
 #%patch0 -p0
 
 cat <<EOF > config.toml
@@ -86,6 +87,7 @@ rpath = false
 EOF
 
 %build
+:<< _EOF
 ./x.py build %{_smp_mflags}
 
 %install
@@ -143,12 +145,12 @@ cd -
 %defattr(-,root,root)
 #%{_libdir}/libLLVM-11-rust-%{version}-stable.so*
 %{_libdir}/rustlib/src/rust/Cargo.lock
-%{_libdir}/libchalk_derive-*.so
-%{_libdir}/libserde_derive-*.so
+#%{_libdir}/libchalk_derive-*.so
+#%{_libdir}/libserde_derive-*.so
 %{_libdir}/librustc*.so
 %{_libdir}/libstd-*.so
 %{_libdir}/libtest-*.so
-%{_libdir}/libtracing_attributes-*.so
+#%{_libdir}/libtracing_attributes-*.so
 %dir %{_libdir}/rustlib
 %{_libdir}/rustlib/components
 %{_libdir}/rustlib/rust-installer-version
@@ -193,6 +195,9 @@ cd -
 #%doc README.md
 
 %changelog
+* Sat Mar 27 2021 Automatic Build System <autodist@mambasoft.it> 1.51.0-1mamba
+- automatic version update by autodist
+
 * Sat Feb 27 2021 Automatic Build System <autodist@mambasoft.it> 1.50.0-1mamba
 - automatic version update by autodist