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-rw-r--r--nixos/modules/installer/cd-dvd/installation-cd-base.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/installer/cd-dvd/installation-cd-base.nix b/nixos/modules/installer/cd-dvd/installation-cd-base.nix
index 1aba67dcd9e..2a28131c28c 100644
--- a/nixos/modules/installer/cd-dvd/installation-cd-base.nix
+++ b/nixos/modules/installer/cd-dvd/installation-cd-base.nix
@@ -19,7 +19,7 @@ with pkgs.lib;
   # ISO naming.
   isoImage.isoName = "${config.isoImage.isoBaseName}-${config.system.nixosVersion}-${pkgs.stdenv.system}.iso";
 
-  isoImage.volumeID = substring 0 32 "NIXOS_${config.system.nixosVersion}";
+  isoImage.volumeID = substring 0 11 "NIXOS_${config.system.nixosVersion}";
 
   # Make the installer more likely to succeed in low memory
   # environments.  The kernel's overcommit heustistics bite us