diff --git a/scripts/create-mkdebian.sh b/scripts/create-mkdebian.sh
index a1cfda4d..860ca74b 100644
--- a/scripts/create-mkdebian.sh
+++ b/scripts/create-mkdebian.sh
@@ -128,7 +128,7 @@ _cat <<- EOT
 	|	mkdir -p \`dirname \$INSTALL_LOG\`
 	|	> \$INSTALL_LOG
 	|	\\\$(MAKE) ENV_PREFIX=\\\$(ENV_PREFIX) INSTALL_LOG=\\\$(INSTALL_LOG) install
-	|	PATH=$JWB_SCRIPT_DIR:\\\$(PATH) /bin/bash pkg.sh milk-install-log -p \\\$(ENV_PREFIX) -n \\\$(NAME) -t deb \$INSTALL_LOG \\\$(DEB_DIR)
+	|	PATH=$JWB_SCRIPT_DIR:\\\$(PATH) /bin/bash pkg.sh -m $JWB_SCRIPT_DIR milk-install-log -p \\\$(ENV_PREFIX) -n \\\$(NAME) -t deb \$INSTALL_LOG \\\$(DEB_DIR)
 	|	dh_installdirs
 	|
 	|override_dh_install:
diff --git a/scripts/pkg.sh b/scripts/pkg.sh
index 1d5b4d85..1943a7fb 100644
--- a/scripts/pkg.sh
+++ b/scripts/pkg.sh
@@ -39,6 +39,21 @@ os()
 	/bin/bash $JWB_SCRIPT_DIR/get-os.sh
 }
 
+os_cascade()
+{
+	/usr/bin/python3 $JWB_SCRIPT_DIR/jw-pkg.py projects os-cascade
+}
+
+cfg_section()
+{
+	ini_section "$inifile" $@
+}
+
+cfg_escape()
+{
+	sed 's/\\/\\\\/g; s/\$/\\$/g; s/`/\\`/g'
+}
+
 scm_commit()
 {
 	case $SCM in
@@ -941,15 +956,6 @@ cmd_milk_install_log()
 		echo "$*" | sed "s/.*attr(\(LINK\|[0-9]\+\),\([^,]\+\),\([^,)]\+\)).*/\\$attr/"
 	}
 
-	milk_install_log_init_postinst()
-	{
-		cat <<- EOT > $1
-		#!/bin/sh
-
-		EOT
-		chmod 755 $1
-	}
-
 	cat_log()
 	{
 		cat $in | sed '
@@ -1048,20 +1054,61 @@ cmd_milk_install_log()
 		cat_log | grep "%config" | cleanup_line_deb | grep -ve $filter_devel > $out/conffiles.$name-run
 		cat_log | grep "%config" | cleanup_line_deb | grep -e  $filter_devel > $out/conffiles.$name-devel
 
+		# Create maintainer scripts
 		for p in run devel; do
-			postinst=$out/$name-$p.postinst
-			milk_install_log_init_postinst $postinst
-			cat $out/$name-$p.dirs $out/$name-$p.install | grep . | while read file dir; do
-				#echo read file \"$file\" >&2
-				file=`echo /$file | sed 's/inst-root\///; s%^//*%/%'`
-				#echo file is now \"$file\" >&2
-				#echo grep \"$prefix/*$file$\" $in >&2
-				line=`grep $file$ $in`
-				perm=`milk_install_log_spec_attr 1 "$line"`
-				owner=`milk_install_log_spec_attr 2 "$line"`
-				group=`milk_install_log_spec_attr 3 "$line"`
-				echo "chown $owner:$group $file" >> $postinst
-				[ "$perm" = "LINK" ] || echo "chmod $perm $file" >> $postinst
+
+			local stage
+			for stage in pre preun post postun; do
+
+				case $stage in
+					pre) deb_stage=preinst;;
+					post) deb_stage=postinst;;
+					preun) deb_stage=prerm;;
+					postun) deb_stage=postrm;;
+				esac
+				local script=$out/$name-$p.$deb_stage
+
+				cat <<- EOT > $script
+				#!/bin/sh
+
+				EOT
+				chmod 755 $script
+
+				case $stage in
+					post)
+						cat $out/$name-$p.dirs $out/$name-$p.install | grep . | while read file dir; do
+							#echo read file \"$file\" >&2
+							file=`echo /$file | sed 's/inst-root\///; s%^//*%/%'`
+							#echo file is now \"$file\" >&2
+							#echo grep \"$prefix/*$file$\" $in >&2
+							line=`grep $file$ $in`
+							perm=`milk_install_log_spec_attr 1 "$line"`
+							owner=`milk_install_log_spec_attr 2 "$line"`
+							group=`milk_install_log_spec_attr 3 "$line"`
+							echo "chown $owner:$group $file" >> $script
+							[ "$perm" = "LINK" ] || echo "chmod $perm $file" >> $script
+						done
+						;;
+					*)
+						;;
+				esac
+
+				echo "== processing stage $stage: cfg_section pkg.$p.$stage" >&2
+				local os content=""
+				for os in '' `os_cascade`; do
+					local sec=pkg.$p.$stage head=""
+					if [ "$os" ]; then
+						sec="$sec.$os"
+						head="\n# --- $os\n"
+					fi
+					cfg_section $sec | grep -q . || continue
+					content="$content$head`cfg_section $sec`"
+				done
+				if [ "$content" ]; then
+					echo -e "$content" >&2
+					echo -e "\n$content" | cfg_escape >> $script
+				fi
+				cat $script | grep -v '^#!/bin\|^$' | grep -q . || rm $script
 			done
 		done
 		;;
@@ -1168,9 +1215,12 @@ while [ ${1:0:1} = - ]; do
 	shift
 done
 
-[ "$JWB_SCRIPT_DIR" ]  || JWB_SCRIPT_DIR=`dirname $0`
+[ "$JWB_SCRIPT_DIR" ]  || JWB_SCRIPT_DIR="$(dirname $0)"
 [ "$PROJECT" ] || PROJECT=`abspath $TOPDIR | xargs basename`
 
+inifile=$PROJECT_DESCR_FILE
+. $JWB_SCRIPT_DIR/ini-tools.sh
+
 cmd=$1
 shift