diff --git a/rustc.spec b/rustc.spec
index fffea42..0d971bf 100644
--- a/rustc.spec
+++ b/rustc.spec
@@ -1,6 +1,6 @@
 %define stage1 1
 Name:          rustc
-Version:       1.64.0
+Version:       1.67.0
 Release:       1mamba
 Summary:       The Rust programming language, designed to be a safe, concurrent, practical language
 Group:         Applications/Development
@@ -17,6 +17,7 @@ BuildRequires: libcurl-devel
 BuildRequires: libgcc
 BuildRequires: libgit2-devel
 BuildRequires: libopenssl-devel
+BuildRequires: libstdc++6-devel
 BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
@@ -51,6 +52,8 @@ This package contains the documentation for %{name}.
 
 cat <<EOF > config.toml
 # see config.toml.example for more possible options
+changelog-seen = 2
+
 [llvm]
 ninja = true
 %ifarch arm
@@ -67,9 +70,12 @@ target= ["arm-unknown-linux-gnueabi"]
 cargo = "/usr/bin/cargo"
 rustc = "/usr/bin/rustc"
 %endif
-python = "python2.7"
 extended = true
 sanitizers = false
+build-stage = 2
+doc-stage = 2
+install-stage = 2
+test-stage = 2
 
 [install]
 prefix = "%{_prefix}"
@@ -80,14 +86,15 @@ docdir = "share/doc/rust"
 # 0 or the new default of 16 is faster, but can result in worse performance
 # https://github.com/rust-lang/rust/issues/47745
 codegen-units = 1
+codegen-units-std = 1
 #debuginfo = true
 #debuginfo-lines = true
+debuginfo-level-std = 2
 channel = "stable"
 rpath = false
 EOF
 
 %build
-#:<< _EOF
 ./x.py build %{_smp_mflags}
 
 %install
@@ -112,7 +119,7 @@ cd -
 %find_lang %{name} || touch %{name}.lang
 
 %clean
-[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+#[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
 %post -n lib%{name} -p /sbin/ldconfig
 %postun -n lib%{name} -p /sbin/ldconfig
@@ -124,10 +131,8 @@ cd -
 %{_bindir}/cargo
 %{_bindir}/cargo-fmt
 %{_bindir}/cargo-clippy
-#%{_bindir}/cargo-miri
 %{_bindir}/clippy-driver
-#%{_bindir}/miri
-%{_bindir}/rls
+#%{_bindir}/rls
 %{_bindir}/rust-analyzer
 %{_bindir}/rust-demangler
 %{_bindir}/rust-gdb
@@ -191,12 +196,17 @@ cd -
 %{_datadir}/doc/rust/README.md
 %{_datadir}/doc/rust/README.md.old
 %{_datadir}/doc/rust/html/.lock
-%{_datadir}/doc/rust/html/.stamp
 %dir %{_datadir}/doc/rust/html
 %{_datadir}/doc/rust/html/*
 #%doc README.md
 
 %changelog
+* Fri Jan 27 2023 Automatic Build System <autodist@mambasoft.it> 1.67.0-1mamba
+- automatic version update by autodist
+
+* Tue Nov 08 2022 Automatic Build System <autodist@mambasoft.it> 1.65.0-1mamba
+- automatic version update by autodist
+
 * Fri Sep 23 2022 Automatic Build System <autodist@mambasoft.it> 1.64.0-1mamba
 - automatic version update by autodist