diff --git a/ci/release/template/scripts/lib.sh b/ci/release/template/scripts/lib.sh
index bfed4d18a..06bf48d34 100644
--- a/ci/release/template/scripts/lib.sh
+++ b/ci/release/template/scripts/lib.sh
@@ -65,7 +65,7 @@ temp_exittrap() {
 temppath() {
   ensure_tmpdir
   while true; do
-    temppath=$_TMPDIR/$(</dev/urandom head -c8 | base32)
+    temppath=$_TMPDIR/$(</dev/urandom od -N8 -tx -An -v | tr -d '[:space:]')
     if [ ! -e "$temppath" ]; then
       echo "$temppath"
       return
diff --git a/ci/sub b/ci/sub
index 7a098b36a..938186155 160000
--- a/ci/sub
+++ b/ci/sub
@@ -1 +1 @@
-Subproject commit 7a098b36a1bb9a5b894c596a6cccd029b6f3359d
+Subproject commit 938186155d9b05f324f844b894545fe4f77ebd99
diff --git a/install.sh b/install.sh
index dc01654d3..b1434c24d 100755
--- a/install.sh
+++ b/install.sh
@@ -70,7 +70,7 @@ temp_exittrap() {
 temppath() {
   ensure_tmpdir
   while true; do
-    temppath=$_TMPDIR/$(</dev/urandom head -c8 | base32)
+    temppath=$_TMPDIR/$(</dev/urandom od -N8 -tx -An -v | tr -d '[:space:]')
     if [ ! -e "$temppath" ]; then
       echo "$temppath"
       return