-git checkout $release
-git submodule update --init
-
-mkdir -p src/cypherpunks.ru/gogost/vendor
-cat > $tmp/includes <<EOF
-golang.org/x/crypto/AUTHORS
-golang.org/x/crypto/CONTRIBUTORS
-golang.org/x/crypto/LICENSE
-golang.org/x/crypto/PATENTS
-golang.org/x/crypto/README
-golang.org/x/crypto/pbkdf2
+git checkout v$release
+
+crypto_mod_path=$(sed -n 's#^require \(golang.org/x/crypto\) \(.*\)$#\1@\2#p' go.mod)
+mkdir -p src/$mod_name
+mv \
+ gost28147 \
+ gost3410 \
+ gost34112012256 \
+ gost34112012512 \
+ gost341194 \
+ gost3412128 \
+ gost341264 \
+ gost3413 \
+ mgm \
+ prfplus \
+ cmd internal gogost.go go.mod go.sum src/$mod_name
+
+rm module-name.do clean.do
+echo $mod_name > module-name
+find . -name "*.do" -exec perl -i -npe "s/^go/GOPATH=\`pwd\` go/" {} \;
+
+mkdir -p src/golang.org/x/crypto
+( cd $GOPATH/pkg/mod/$crypto_mod_path ; \
+ tar cf - AUTHORS CONTRIBUTORS LICENSE PATENTS README.md pbkdf2 hkdf ) |
+ tar xfC - src/golang.org/x/crypto
+
+cat > download.texi <<EOF
+You can obtain releases source code prepared tarballs on
+@url{http://gogost.cypherpunks.ru/}.