diff --git a/pkgs/misc/screensavers/vlock/default.nix b/pkgs/misc/screensavers/vlock/default.nix
index 031afeeca2f..0e5e87245f3 100644
--- a/pkgs/misc/screensavers/vlock/default.nix
+++ b/pkgs/misc/screensavers/vlock/default.nix
@@ -9,7 +9,9 @@ stdenv.mkDerivation {
   };
 
   prePatch = ''
-    sed -i -e '/INSTALL/s/-[og] [^ ]*//g' Makefile modules/Makefile
+    sed -i -e '/INSTALL/ {
+      s/-[og] [^ ]*//g; s/4711/755/
+    }' Makefile modules/Makefile
   '';
 
   patches = [ ./eintr.patch ];