diff --git a/debian/changelog b/debian/changelog
index 46d4cf79..d615129b 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,8 +1,12 @@
-livecd-rootfs (24.04.39) UNRELEASED; urgency=medium
+livecd-rootfs (24.04.39ubuntu1) UNRELEASED; urgency=medium
 
+  [ Steve Langasek ]
   * Pare down 'BASE_SEED' handling to only those flavors which still use it.
 
- -- Steve Langasek <steve.langasek@ubuntu.com>  Sun, 18 Feb 2024 10:27:50 -0800
+  [ Łukasz 'sil2100' Zemczak ]
+  * Attempt building netboot tarballs for largemem arm64 server images.
+
+ -- Łukasz 'sil2100' Zemczak <lukasz.zemczak@ubuntu.com>  Tue, 20 Feb 2024 17:04:01 +0100
 
 livecd-rootfs (24.04.38) noble; urgency=medium
 
diff --git a/live-build/ubuntu-server/hooks/05-netboot-tarball.binary b/live-build/ubuntu-server/hooks/05-netboot-tarball.binary
index eef58f64..9db81625 100755
--- a/live-build/ubuntu-server/hooks/05-netboot-tarball.binary
+++ b/live-build/ubuntu-server/hooks/05-netboot-tarball.binary
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 case $PASS in
-    ubuntu-server-minimal.ubuntu-server.installer.generic.netboot)
+    ubuntu-server-minimal.ubuntu-server.installer.generic*.netboot)
         ;;
     *)
         exit 0
@@ -10,7 +10,11 @@ esac
 
 set -eux
 
-flavor=generic
+# Extract the flavor from the pass name
+flavor=${PASS%%.netboot}
+flavor=${flavor##*.}
+
+PROJECT=$PROJECT${SUBARCH:+-$SUBARCH}
 
 KERNEL=${PWD}/livecd.${PROJECT}.kernel-$flavor
 INITRD=${PWD}/livecd.${PROJECT}.initrd-$flavor