diff --git a/Config.in b/Config.in
index aee3253..b9692f8 100644
--- a/Config.in
+++ b/Config.in
@@ -1077,12 +1077,23 @@ menu "System configuration"
 endmenu        #--- System configuration
 
 menu "Advanced Features"
-depends on !BOOK_BLFS
+depends on !BOOK_BLFS && !REBUILD_MAKEFILE
 
     config    REPORT
         bool "Create SBU and disk usage report"
         default y
 
+    config    SAVE_CH5
+        bool "Save Chapter 5 work"
+        depends on BOOK_LFS || BOOK_LFS_SYSD
+        default n
+        help
+            Save the state of jhalfs at the end of chapter 5:
+            
+            if you tick this item, the whole $LFS directory is
+            saved when chapter 5 is finished. It'll be in an xz
+            compressed tarball in the $LFS/jhalfs directory
+
     #--- ICA
     config    COMPARE
         bool "Run comparison analysis on final stage"
diff --git a/LFS/master.sh b/LFS/master.sh
index cdc05a7..3eab1a4 100644
--- a/LFS/master.sh
+++ b/LFS/master.sh
@@ -100,7 +100,7 @@ chapter5_Makefiles() {
 # Initialize the Makefile target: it'll change during chapter
 # For vanilla lfs, the "changingowner" script should be run as root. So
 # it belongs to the "SUDO" target, with list in the "runasroot" variable.
-# For new lfs, changingowner and kernfs are in "runsaroot", then the following,
+# For new lfs, changingowner and kernfs are in "runasroot", then the following,
 # starting at creatingdirs, are in the "CHROOT" target, in variable "chapter6".
 # Makefile_target records the variable, not really the target!
 # We use a case statement on that variable, because instructions in the
@@ -441,6 +441,8 @@ build_Makefile() {           #
 
   chapter4_Makefiles
   chapter5_Makefiles
+  # Add the save target, if needed
+  [[ "$SAVE_CH5" = "y" ]] && wrt_save_target $Makefile_target
   chapter6_Makefiles
   # Add the iterations targets, if needed
   [[ "$COMPARE" = "y" ]] && wrt_compare_targets
diff --git a/common/libs/func_compare.sh b/common/libs/func_compare.sh
index d5e2f3d..a4718db 100644
--- a/common/libs/func_compare.sh
+++ b/common/libs/func_compare.sh
@@ -53,7 +53,7 @@ wrt_compare_work() {               #
   local ITERATION=$1
   local   PREV_IT=$2
   local PRUNEPATH="/dev /home /${SCRIPT_ROOT} /lost+found /media /mnt /opt /proc \
-/sources /root /srv /sys /tmp /tools /usr/local /usr/src"
+/sources /root /run /srv /sys /tmp /tools /usr/local /usr/src /var"
 
   local    ROOT_DIR=/
   local DEST_TOPDIR=/${SCRIPT_ROOT}
diff --git a/common/libs/func_validate_configs.sh b/common/libs/func_validate_configs.sh
index 34f6150..0f7a816 100644
--- a/common/libs/func_validate_configs.sh
+++ b/common/libs/func_validate_configs.sh
@@ -51,7 +51,7 @@ inline_doc
   local -r LFS_system="HOSTNAME INTERFACE IP_ADDR GATEWAY PREFIX BROADCAST DOMAIN DNS1 DNS2 FONT KEYMAP LOCAL LOG_LEVEL"
 
   # Full list of books settings
-  local -r   lfs_PARAM_LIST="$LFS_book   $GENERAL_common $LFS_build $LFS_system  $ADVANCED_chroot REALSBU $ADVANCED_common"
+  local -r   lfs_PARAM_LIST="$LFS_book   $GENERAL_common $LFS_build $LFS_system  $ADVANCED_chroot REALSBU SAVE_CH5 $ADVANCED_common"
   local -r  hlfs_PARAM_LIST="$HLFS_book  $GENERAL_common $HLFS_build  $ADVANCED_chroot $ADVANCED_common"
   local -r  clfs_PARAM_LIST="$CLFS_book  $GENERAL_common $CLFS_build  $ADVANCED_chroot $ADVANCED_common"
   local -r clfs2_PARAM_LIST="$CLFS2_book $GENERAL_common $CLFS2_build                  $ADVANCED_common"
diff --git a/jhalfs b/jhalfs
index 38dd8b5..2c01ac3 100755
--- a/jhalfs
+++ b/jhalfs
@@ -178,6 +178,7 @@ SET_BLOWFISH=${SET_BLOWFISH:=n}
 UNICODE=${UNICODE:=n}
 LOCAL=${LOCAL:=n}
 REALSBU=${REALSBU:=n}
+SAVE_CH5=${SAVE_CH5:=n}
 
 if [[ "${NO_PROGRESS_BAR}" = "y" ]] ; then
 # shellcheck disable=SC2034
@@ -354,6 +355,11 @@ if [[ "$COMPARE" = "y" ]]; then
   load_file "${COMMON_DIR}/libs/func_compare.sh" 'Loading compare module'
 fi
 #
+# save module
+if [[ "$SAVE_CH5" = "y" ]]; then
+  load_file "${COMMON_DIR}/libs/func_save.sh" 'Loading save module'
+fi
+#
 # optimize module
 if [[ "$OPTIMIZE" != "0" ]]; then
   load_file optimize/optimize_functions 'Loading optimization module'