diff --git a/ci/release/template/scripts/lib.sh b/ci/release/template/scripts/lib.sh
index 3ebcfdb71..ff78d5171 100644
--- a/ci/release/template/scripts/lib.sh
+++ b/ci/release/template/scripts/lib.sh
@@ -417,8 +417,9 @@ manpath() {
 }
 
 is_writable_dir() {
-  # If it can be created, we can use it.
-  hide mkdir -p "$1"
+  mkdir -p "$1" 2>/dev/null
+  # directory must exist otherwise -w returns 1 even for paths that should be writable.
+  [ -w "$1" ]
 }
 
 ensure_prefix() {
diff --git a/ci/sub b/ci/sub
index c8ad46ee4..4beb5c09e 160000
--- a/ci/sub
+++ b/ci/sub
@@ -1 +1 @@
-Subproject commit c8ad46ee4ee10872b7d509ad6381922ee69bd5c0
+Subproject commit 4beb5c09e5e3380641ee7e3b0c1d4f6358cca544
diff --git a/install.sh b/install.sh
index ede6c0141..a00d34e34 100755
--- a/install.sh
+++ b/install.sh
@@ -553,8 +553,9 @@ manpath() {
 }
 
 is_writable_dir() {
-  # If it can be created, we can use it.
-  hide mkdir -p "$1"
+  mkdir -p "$1" 2>/dev/null
+  # directory must exist otherwise -w returns 1 even for paths that should be writable.
+  [ -w "$1" ]
 }
 
 ensure_prefix() {