diff --git a/g5k-postinstall b/g5k-postinstall
index 177ea793d9e6e10ea8f2e30f78e65a3669d3916a..1b81dd7a18826fd8c5deb6627611e140cea32781 100755
--- a/g5k-postinstall
+++ b/g5k-postinstall
@@ -844,7 +844,7 @@ if [ ['lille', 'chifflot'], ['lille', 'chiclet'], ['nancy', 'grappe'] ].include?
 end
 
 if $mysite == 'nancy' and ( $mycluster == 'grcinq' or $mycluster == 'grvingt' ) and not $nohacks.include?('beegfs-gr520')
-  if envrelease =~ /debian10-x64-/ and Dir.exists?("#{DSTDIR}/etc/beegfs")
+  if envrelease =~ /debian(10|11)-x64-/ and Dir.exists?("#{DSTDIR}/etc/beegfs")
     $logger.info("Setup beegfs")
     beegfs_configure
   end