diff --git a/packages/falter-berlin-admin-keys/Makefile b/packages/falter-berlin-admin-keys/Makefile
index 33026cef..64a0936a 100644
--- a/packages/falter-berlin-admin-keys/Makefile
+++ b/packages/falter-berlin-admin-keys/Makefile
@@ -34,7 +34,9 @@ endef
 
 define Package/falter-berlin-admin-keys/postinst
 #!/bin/sh
-$${IPKG_INSTROOT}/tmp/falter-berlin-admin-keys/register_keys.sh
+if [ -z $${IPKG_INSTROOT} ] ; then
+  /tmp/falter-berlin-admin-keys/register_keys.sh
+fi
 endef
 
 $(eval $(call BuildPackage,falter-berlin-admin-keys))
diff --git a/packages/falter-berlin-autoupdate/files/post-inst.sh b/packages/falter-berlin-autoupdate/files/post-inst.sh
index 0abebc53..96b53778 100644
--- a/packages/falter-berlin-autoupdate/files/post-inst.sh
+++ b/packages/falter-berlin-autoupdate/files/post-inst.sh
@@ -4,6 +4,8 @@
 # intended. You better shouldn't touch anything here.
 # shellcheck disable=all
 
+[ -z $IPKG_INSTROOT ] || exit 0
+
 # if autoupdate is not present in crontab, include it.
 crontab -l | grep /usr/bin/autoupdate >>/dev/null
 if [ $? != 0 ]; then
diff --git a/packages/falter-berlin-bbbdigger/files/etc/uci-defaults/90-bbbdigger b/packages/falter-berlin-bbbdigger/files/etc/uci-defaults/90-bbbdigger
index db8f7d24..fdef85ec 100755
--- a/packages/falter-berlin-bbbdigger/files/etc/uci-defaults/90-bbbdigger
+++ b/packages/falter-berlin-bbbdigger/files/etc/uci-defaults/90-bbbdigger
@@ -8,6 +8,8 @@
 #
 # All other config sections are overwritten with current settings
 
+[ -z $IPKG_INSTROOT ] || exit 0
+
 . /lib/functions.sh
 
 TUNNEL_SRV='_bbb-vpn._udp.berlin.freifunk.net'
diff --git a/packages/falter-berlin-ssid-changer/files/post-inst.sh b/packages/falter-berlin-ssid-changer/files/post-inst.sh
index 743a0265..5e91f729 100644
--- a/packages/falter-berlin-ssid-changer/files/post-inst.sh
+++ b/packages/falter-berlin-ssid-changer/files/post-inst.sh
@@ -1,5 +1,6 @@
 #!/bin/sh
-#
+
+[ -z $IPKG_INSTROOT ] || exit 0
 
 # if ssid-changer is not present in crontab, include it.
 crontab -l | grep ssid-changer >>/dev/null