diff --git a/debian/update-dch-from-git b/debian/update-dch-from-git
index 93d8fb5297f..e5af4fae85b 100755
--- a/debian/update-dch-from-git
+++ b/debian/update-dch-from-git
@@ -9,6 +9,8 @@ source scripts/githelper.sh
 githelper "$1"
 
 GIT_VERSION=$(scripts/get-version-from-git "$GIT_BRANCH")
+# Need to use $? because we need the output capture
+# shellcheck disable=SC2181
 if [ $? -ne 0 ]; then
     echo "error determining version!"
     exit 1
diff --git a/docs/src/asciideps b/docs/src/asciideps
index af1d19ab7d9..b1bd54dcd85 100755
--- a/docs/src/asciideps
+++ b/docs/src/asciideps
@@ -1,14 +1,16 @@
-#!/bin/sh
+#!/bin/bash
 
 set -e
 
 test -z "$1" && exit 0
 test -f "$1" || exit 1
 
+includestack=( )
+
 includes () {
 	DIR=$(dirname "$1")
 
-	for f in $(sed -ne "s|^include::\(.*\)\[\]$|$DIR/\1|p" "$1"); do
+	while IFS= read -r f; do
 		# components_gen.adoc will contain only generated content
 		case "$f" in
 			*/components_gen.adoc)
@@ -16,8 +18,15 @@ includes () {
 			;;
 		esac
 		echo "$f"
+		ff=$(realpath "$f")
+		if [[ " ${includestack[*]} " =~ [[:space:]]${ff}[[:space:]] ]]; then
+			echo "Include file recursion detected on '$f'. Skipped." >&2
+			continue
+		fi
+		includestack+=("$ff")
 		includes "$f"
-	done
+		unset 'includestack[${#includestack[@]}-1]'
+	done < <(sed -ne "s|^include::\(.*\)\[\]$|$DIR/\1|p" "$1")
 }
 
 images() {
diff --git a/scripts/linuxcnc_info.in b/scripts/linuxcnc_info.in
index cba739765ed..324ad0564f5 100755
--- a/scripts/linuxcnc_info.in
+++ b/scripts/linuxcnc_info.in
@@ -90,7 +90,7 @@ function parse_after_colon () {
 
 function tryversion () {
   prog="$1"
-  if [ $(command -v "$prog") ] ; then
+  if [ "$(command -v "$prog")" ] ; then
      ans=$($prog --version 2>/dev/null)
      if [ -z "$ans" ] ; then
        echo "?"
@@ -165,9 +165,14 @@ for n in $(linuxcnc_var all) ; do
    show "${n%%=*}" "${n##*=}"
 done
 
+# Not everybody runs Debian based distros
 echo
-echo "dpkg -l '*linuxcnc*':"
-dpkg -l '*linuxcnc*'
+if command -v dpkg > /dev/null; then
+    echo "dpkg -l '*linuxcnc*':"
+    dpkg -l '*linuxcnc*'
+else
+    echo "No 'dpkg' available, different distro, probably."
+fi
 echo
 
 [ -n "$VIEWER" ] && $VIEWER "$ofile"
diff --git a/scripts/rip-environment.in b/scripts/rip-environment.in
index 13da69e22e8..9ef885a6ab1 100644
--- a/scripts/rip-environment.in
+++ b/scripts/rip-environment.in
@@ -118,8 +118,8 @@ if ! $as_command; then
     else
         _iningc () {
             case "$3" in
-            *.ini) COMPREPLY=($(compgen -o plusdirs -f -X '!*.ngc' -- "$2")) ;;
-            *) COMPREPLY=($(compgen -o plusdirs -f -X '!*.ini' -- "$2"))
+            *.ini) mapfile -t COMPREPLY < <(compgen -o plusdirs -f -X '!*.ngc' -- "$2") ;;
+            *) mapfile -t COMPREPLY < <(compgen -o plusdirs -f -X '!*.ini' -- "$2")
             esac
         }
         complete -o plusdirs -F _iningc emc axis