diff --git a/ci/release/template/scripts/lib.sh b/ci/release/template/scripts/lib.sh
index a6e59fb27..fa7ad8bda 100644
--- a/ci/release/template/scripts/lib.sh
+++ b/ci/release/template/scripts/lib.sh
@@ -46,24 +46,13 @@ if [ "${LIB_TEMP-}" ]; then
 fi
 LIB_TEMP=1
 
-ensure_tmpdir() {
-  if [ -n "${_TMPDIR-}" ]; then
-    return
-  fi
-
+if [ -z "${_TMPDIR-}" ]; then
   _TMPDIR=$(mktemp -d)
   export _TMPDIR
-  trap temp_exittrap EXIT
-}
-
-temp_exittrap() {
-  if [ -n "${_TMPDIR-}" ]; then
-    rm -r "$_TMPDIR"
-  fi
-}
+  trap 'rm -Rf "$_TMPDIR"' EXIT
+fi
 
 temppath() {
-  ensure_tmpdir
   while true; do
     temppath=$_TMPDIR/$(</dev/urandom od -N8 -tx -An -v | tr -d '[:space:]')
     if [ ! -e "$temppath" ]; then
diff --git a/ci/sub b/ci/sub
index dab464462..55e711bb8 160000
--- a/ci/sub
+++ b/ci/sub
@@ -1 +1 @@
-Subproject commit dab464462bfb3818fc7d7b73d1c9b64b46894d28
+Subproject commit 55e711bb8143ed48a412718905c8fa4df30e8665
diff --git a/go.mod b/go.mod
index f3992fe8d..5ee14485d 100644
--- a/go.mod
+++ b/go.mod
@@ -21,7 +21,7 @@ require (
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2
 	gonum.org/v1/plot v0.12.0
 	nhooyr.io/websocket v1.8.7
-	oss.terrastruct.com/util-go v0.0.0-20221208105526-b395c3a8b8fa
+	oss.terrastruct.com/util-go v0.0.0-20221208120114-c00ea6bba2fa
 )
 
 require (
diff --git a/go.sum b/go.sum
index ec7d7f7ed..1a6fa2045 100644
--- a/go.sum
+++ b/go.sum
@@ -806,8 +806,8 @@ honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 nhooyr.io/websocket v1.8.7 h1:usjR2uOr/zjjkVMy0lW+PPohFok7PCow5sDjLgX4P4g=
 nhooyr.io/websocket v1.8.7/go.mod h1:B70DZP8IakI65RVQ51MsWP/8jndNma26DVA/nFSCgW0=
-oss.terrastruct.com/util-go v0.0.0-20221208105526-b395c3a8b8fa h1:oOVEuDUTa38UGXb++mW4FSfIchXiC9VE5o0ncNcYOjY=
-oss.terrastruct.com/util-go v0.0.0-20221208105526-b395c3a8b8fa/go.mod h1:Fwy72FDIOOM4K8F96ScXkxHHppR1CPfUyo9+x9c1PBU=
+oss.terrastruct.com/util-go v0.0.0-20221208120114-c00ea6bba2fa h1:tP4IdUVHWUo+BT5AK8lYC22E+1LEHU+v1Df2QwklYTI=
+oss.terrastruct.com/util-go v0.0.0-20221208120114-c00ea6bba2fa/go.mod h1:Fwy72FDIOOM4K8F96ScXkxHHppR1CPfUyo9+x9c1PBU=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/pdf v0.1.1 h1:k1MczvYDUvJBe93bYd7wrZLLUEcLZAuF824/I4e5Xr4=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
diff --git a/install.sh b/install.sh
index 37f4fbcbb..0e0987fcf 100755
--- a/install.sh
+++ b/install.sh
@@ -51,24 +51,13 @@ if [ "${LIB_TEMP-}" ]; then
 fi
 LIB_TEMP=1
 
-ensure_tmpdir() {
-  if [ -n "${_TMPDIR-}" ]; then
-    return
-  fi
-
+if [ -z "${_TMPDIR-}" ]; then
   _TMPDIR=$(mktemp -d)
   export _TMPDIR
-  trap temp_exittrap EXIT
-}
-
-temp_exittrap() {
-  if [ -n "${_TMPDIR-}" ]; then
-    rm -r "$_TMPDIR"
-  fi
-}
+  trap 'rm -Rf "$_TMPDIR"' EXIT
+fi
 
 temppath() {
-  ensure_tmpdir
   while true; do
     temppath=$_TMPDIR/$(</dev/urandom od -N8 -tx -An -v | tr -d '[:space:]')
     if [ ! -e "$temppath" ]; then