diff --git a/overlays/turnkey.d/github-latest-release/usr/local/bin/gh_releases b/overlays/turnkey.d/github-latest-release/usr/local/bin/gh_releases
index 4d952a87..dd37e570 100755
--- a/overlays/turnkey.d/github-latest-release/usr/local/bin/gh_releases
+++ b/overlays/turnkey.d/github-latest-release/usr/local/bin/gh_releases
@@ -2,7 +2,6 @@
 
 [[ -z $DEBUG ]] || set -x
 
-repo_path="$1" # user/repo_name
 tmp_dir=/tmp/gh_releases
 rm -rf $tmp_dir
 mkdir -p $tmp_dir
@@ -12,14 +11,20 @@ warning() { echo -e "[WARNING] $*" 1>&2; }
 
 usage() {
     cat >&2 <<EOF
-Usage: $(basename "$0") <user>/<repo>
+Usage: $(basename "$0") [OPTIONS] <user>/<repo>
+
+Options:
+    -h|--help   show this help and exit
+    -a|--all    show all (stable) versions, not just the most recent
+    -p|--pre-release
+                include alpha, beta and rc versions
 
 Env Vars:
     # used for github api
     GITHUB_USER
     GITHUB_USER_TOKEN
 
-    # retain temp files and set x if set
+    # retain temp files and set x
     DEBUG
 
     # omit tags or releases in output respectively if set
@@ -31,6 +36,27 @@ Note: Setting GITHUB_USER and GITHUB_USER_TOKEN environment variables are
 EOF
 }
 
+unset show_all pre_release repo_path
+while [[ "$#" -gt 0 ]]; do
+    case $1 in
+        -a|--all)
+            show_all=true;;
+        -p|--pre-release)
+            pre_release=true;;
+        -h|--help)
+            usage
+            exit;;
+        *)
+            if [[ -z "$repo_path" ]]; then
+                repo_path="$1"
+            else
+                usage
+                fatal "Unknown option: $1"
+           fi;;
+    esac
+    shift
+done
+
 if [[ -z "$repo_path" ]]; then
     usage
     fatal "user/repo not provided!"
@@ -63,7 +89,9 @@ get_page() {
     page=$3
     tmp_file=$(mktemp $tmp_dir/XXXX.tmp)
     curl "$USER" -b /tmp/cookies.txt -c /tmp/cookies.txt -s "${url}?page=${page}&per_page=100" > "$tmp_file" 2>/dev/null || true
-    if grep '"message"' "$tmp_file"; then
+    if grep "Bad credentials" "$tmp_file" >/dev/null ; then
+        fatal "Bad GitHub credentials"
+    elif grep '"message"' "$tmp_file"; then
         fatal "$repo_path: $(sed -En '\|message|s|^.*: "(.*)",$|\1|p' "$tmp_file")"
     else
         grep -oP "\"$key\": \"\\K(.*)(?=\")" "$tmp_file"
@@ -89,5 +117,12 @@ get_all_pages() {
 [[ -z $NO_TAGS ]] && get_all_pages "https://api.github.com/repos/${repo_path}/tags" "name"
 
 echo "Done!" 1>&2
-cat $tmp_dir/releases | sort --version-sort --unique
-[[ -n $DEBUG ]] || rm -rf $tmp_dir
+versions=$(cat $tmp_dir/releases | sort --version-sort --unique)
+if [[ -z "$pre_release" ]]; then
+    versions=$(grep -vi 'alpha\|beta\|rc' <<<"$versions")
+fi
+if [[ -z "$show_all" ]]; then
+    versions=$(tail -1 <<<"$versions")
+fi
+echo "$versions"
+[[ -z $DEBUG ]] && rm -rf $tmp_dir