[script/builder] handling portage repos.conf with local Overlay

script/builder

@@ -62,17 +62,24 @@ system("echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen"); #be sure about that.
 system("cd /etc/portage/;git checkout master; git pull");
 system("echo 'y' | layman -f -a $_") for @overlays;
 
+my $reponame="LocalOverlay";
+
 # Setting up a local overlay if doesn't exists
 if (!-f "/usr/local/portage/profiles/repo_name") {
     system("mkdir -p /usr/local/portage/{metadata,profiles}");
     system("echo 'LocalOverlay' > /usr/local/portage/profiles/repo_name");
     system("echo 'masters = gentoo' > /usr/local/portage/metadata/layout.conf");
     system("chown -R portage:portage /usr/local/portage");
+} else {
+    open FILE,"</usr/local/portage/profiles/repo_name";
+    my @FILE=<FILE>;
+    close FILE;
+    chomp(@FILE);
+    $reponame=$FILE[0];
 }
 
-# Anyway should be declared, also if you mount it with docker
 qx{
-echo '[LocalOverlay]
+echo '[$reponame]
 location = /usr/local/portage
 masters = gentoo
 priority=9999