diff --git a/go.spec b/go.spec
index 75c4371..ca70fd0 100644
--- a/go.spec
+++ b/go.spec
@@ -1,6 +1,6 @@
 Name:          go
-Version:       1.14.7
-Release:       2mamba
+Version:       1.16.4
+Release:       1mamba
 Summary:       The Go programming language
 Group:         Applications/Development
 Vendor:        openmamba
@@ -13,10 +13,10 @@ License:       BSD
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
-BuildRequires: gcc-go >= 8.1.0
+BuildRequires: go
+#BuildRequires: gcc-go >= 8.1.0
 Provides:      go-pie
-Obsoletes:     go-pie
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+Obsoletes:     go-pie < 1.16.3
 
 %description
 The Go programming language.
@@ -57,13 +57,13 @@ export GOROOT_FINAL=%{_libdir}/go
 export GO_LDFLAGS="-linkmode internal"
 export CGO_ENABLED=1
 
-# Use gcc-go as bootstrap compiler
-export GOROOT_BOOTSTRAP=/
-sed -i "s|\$GOROOT_BOOTSTRAP/bin/go|/usr/bin/gcc-go|" src/make.bash src/make.rc
-sed -i "s|/bin/go|/usr/bin/go|" src/cmd/dist/buildtool.go
+## Use gcc-go as bootstrap compiler
+#export GOROOT_BOOTSTRAP=/
+#sed -i "s|\$GOROOT_BOOTSTRAP/bin/go|/usr/bin/gcc-go|" src/make.bash src/make.rc
+#sed -i "s|/bin/go|/usr/bin/go|" src/cmd/dist/buildtool.go
 
 # golang
-#export GOROOT_BOOTSTRAP=%{_libdir}/go
+export GOROOT_BOOTSTRAP=%{_libdir}/go
 
 cd src
 ./make.bash --no-clean -v
@@ -122,6 +122,12 @@ fi
 #%doc README.md
 
 %changelog
+* Fri May 07 2021 Automatic Build System <autodist@mambasoft.it> 1.16.4-1mamba
+- automatic version update by autodist
+
+* Thu May 06 2021 Automatic Build System <autodist@mambasoft.it> 1.16.3-1mamba
+- automatic version update by autodist
+
 * Sun Aug 16 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.14.7-2mamba
 - install alternatives for go and gofmt binaries