diff --git a/make/projects-dir.mk b/make/projects-dir.mk
index 5539ad4f..1eecdefb 100644
--- a/make/projects-dir.mk
+++ b/make/projects-dir.mk
@@ -67,7 +67,8 @@ JW_PKG_PY                    = python3 $(JWB_SCRIPT_DIR)/jw-pkg.py --prefix $(sh
 SSH_WRAPPER_SH              := $(CWD)/ssh-wrapper.sh
 
 EXCLUDES_FILE               ?= exclude.txt
-EXCLUDES_FILES               = $(wildcard $(patsubst %,exclude-%.txt,$(shell $(JW_PKG_PY) distro info --format '%{cascade}')) $(EXCLUDES_FILE))
+EXCLUDES_FILES              := $(wildcard $(patsubst %,exclude-%.txt,$(shell $(JW_PKG_PY) distro info --format '%{cascade}')) $(EXCLUDES_FILE))
+
 ifneq ($(EXCLUDES_FILES),)
   EXCLUDE_FROM_BUILD        += $(shell sed 's/\#.*//g' $(EXCLUDES_FILES))
 endif
diff --git a/scripts/get-os.sh b/scripts/get-os.sh
deleted file mode 100755
index 4ddc3add..00000000
--- a/scripts/get-os.sh
+++ /dev/null
@@ -1,174 +0,0 @@
-#!/bin/bash
-########################################################################
-#                                                                      #
-# generic utiltiy modules                                              #
-# (c) 2001 jannet it services                                          #
-# contact@jannet.de                                                    #
-#                                                                      #
-# $Id$
-#                                                                      #
-# This program is free software; permission to use, copy, modify,      #
-# distribute, and sell this software and its documentation under the   #
-# terms of the GNU Public license as published by the Free Software    #
-# Foundation, either version 2 or any later version of the license, is #
-# hereby granted without fee, provided that (i) the above copyright    #
-# notices and this permission notice appear in all copies of the       #
-# software and related documentation, and (ii) the name of JanNet may  #
-# not be used in any advertising or publicity relating to the software #
-# without the specific, prior written permission of JanNet.            #
-#                                                                      #
-# This program is distributed in the hope that it will be useful, but  #
-# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN-  #
-# TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General    #
-# Public License for more details.                                     #
-#                                                                      #
-# You should have received a copy of the GNU General Public License    #
-# along with this program; if not, write to the Free Software Founda-  #
-# tion, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                  #
-#                                                                      #
-########################################################################
-
-usage()
-{
-	echo "
-	usage: $myname [-h]
-	       $myname [-v]
-	       $myname [-V]
-"
-	[ "$1" ] && exit $1
-}
-
-cmd_name_version()
-{
-	if [ -r /etc/os-release ]; then
-		. /etc/os-release
-		if [ "$opt_verbose" ]; then
-			echo $NAME $VERSION
-			exit 0
-		fi
-		if grep -qi tumbleweed /etc/os-release; then
-			echo suse-tumbleweed
-			exit 0
-		fi
-
-		case "$ID" in
-			ubuntu|centos)
-				;;
-			*)
-				[ "$ID_LIKE" ] && ID=$ID_LIKE
-				;;
-		esac
-
-		case "$ID" in
-		debian)
-			VERSION_NAME=`echo $PRETTY_NAME | awk 'NF>1{print $NF}' | sed 's%/.*%%' | tr '[A-Z]' '[a-z]'`
-			case $VERSION_NAME in
-			buster)       VERSION_ID=10;;
-			stretch)      VERSION_ID=9;;
-			jessie)       VERSION_ID=8;;
-			wheezy)       VERSION_ID=7;;
-			squeeze)      VERSION_ID=6.0;;
-			lenny)        VERSION_ID=5.0;;
-			etch)         VERSION_ID=4.0;;
-			sarge)        VERSION_ID=3.1;;
-			woody)        VERSION_ID=3.0;;
-			potato)       VERSION_ID=2.2;;
-			slink)        VERSION_ID=2.1;;
-			hamm)         VERSION_ID=2.0;;
-			*)
-				;;
-			esac
-			;;
-		centos)
-			;;
-		ubuntu)
-			;;
-		suse|opensuse)
-			;;
-		*)
-			VERSION_ID=42
-			;;
-		esac
-		echo $ID-$VERSION_ID | sed 's/opensuse/suse/g'
-		exit 0
-	fi
-
-	if [ -e /etc/SuSE-release ]; then
-		if [ "$opt_verbose" ]; then
-			head -1 /etc/SuSE-release
-		else
-			VERSION="`grep VERSION /etc/SuSE-release | sed -e 's/.*=//; s/ //g'`"
-			echo suse-$VERSION
-		fi
-		exit
-	fi
-
-	if [ "$opt_verbose" ]; then
-		uname -a
-	else
-		uname -r
-	fi
-}
-
-cmd_version()
-{
-	local nv=`cmd_name_version`
-	echo ${nv#*-}
-}
-
-cmd_name()
-{
-	local nv=`cmd_name_version`
-	echo ${nv%%-*}
-}
-
-cmd_type()
-{
-	echo linux
-}
-
-cmd_tuple()
-{
-	local nv=`cmd_name_version`
-	local dm=`gcc -dumpmachine`
-	local arch=${dm%%-*}
-	local vendor=${nv%%-*}
-	local os=linux
-	local lib=gnu
-	echo "$arch-$vendor-$os-$lib"
-}
-
-cmd_triplet()
-{
-	cmd_tuple | sed 's/\([^-]\+\)-\([^-]\+\)-\([^-]\+\)-\([^-]\+\)/\1-\3-\4/'
-}
-
-# --- here we go
-
-myname=`basename $0`
-release_file=/etc/os-release
-cmd=name_version
-
-eval set -- `getopt -- hvV "$@"`
-while [ "$1" != -- ] ; do
-case "$1" in
-	-h)
-		usage 0
-		;;
-	-v)
-		opt_verbose=1;
-		;;
-	-V)
-		cmd=version
-		;;
-	*)
-		usage 1
-		;;
-esac
-shift
-done
-shift
-
-[ "$1" ] && cmd="${1/-/_}"
-
-eval cmd_$cmd