diff --git a/Dockerfile-alpine-perl.template b/Dockerfile-alpine-perl.template
index 8d5a6fa..ccf4bbf 100644
--- a/Dockerfile-alpine-perl.template
+++ b/Dockerfile-alpine-perl.template
@@ -72,7 +72,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi
 
diff --git a/Dockerfile-alpine-slim.template b/Dockerfile-alpine-slim.template
index dcceccb..55dd5ec 100644
--- a/Dockerfile-alpine-slim.template
+++ b/Dockerfile-alpine-slim.template
@@ -77,7 +77,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi \
 # Bring in gettext so we can get `envsubst`, then throw
diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index bc12672..69e4bd9 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -77,7 +77,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi \
 # Bring in curl and ca-certificates to make registering on DNS SD easier
diff --git a/mainline/alpine-perl/Dockerfile b/mainline/alpine-perl/Dockerfile
index 48a9f60..91a6cda 100644
--- a/mainline/alpine-perl/Dockerfile
+++ b/mainline/alpine-perl/Dockerfile
@@ -83,7 +83,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi
 
diff --git a/mainline/alpine-slim/Dockerfile b/mainline/alpine-slim/Dockerfile
index 06f18c7..60601d3 100644
--- a/mainline/alpine-slim/Dockerfile
+++ b/mainline/alpine-slim/Dockerfile
@@ -83,7 +83,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi \
 # Bring in gettext so we can get `envsubst`, then throw
diff --git a/mainline/alpine/Dockerfile b/mainline/alpine/Dockerfile
index 40df0e2..860441c 100644
--- a/mainline/alpine/Dockerfile
+++ b/mainline/alpine/Dockerfile
@@ -87,7 +87,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi \
 # Bring in curl and ca-certificates to make registering on DNS SD easier
diff --git a/stable/alpine-perl/Dockerfile b/stable/alpine-perl/Dockerfile
index e4f5d66..db21bac 100644
--- a/stable/alpine-perl/Dockerfile
+++ b/stable/alpine-perl/Dockerfile
@@ -83,7 +83,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi
 
diff --git a/stable/alpine-slim/Dockerfile b/stable/alpine-slim/Dockerfile
index cea52cc..fc72159 100644
--- a/stable/alpine-slim/Dockerfile
+++ b/stable/alpine-slim/Dockerfile
@@ -83,7 +83,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi \
 # Bring in gettext so we can get `envsubst`, then throw
diff --git a/stable/alpine/Dockerfile b/stable/alpine/Dockerfile
index e83fa43..27c61d7 100644
--- a/stable/alpine/Dockerfile
+++ b/stable/alpine/Dockerfile
@@ -87,7 +87,7 @@ RUN set -x \
 # remove checksum deps
     && apk del --no-network .checksum-deps \
 # if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
-    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
+    && if [ -f "$tempDir" ]; then rm -rf "$tempDir"; fi \
     && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
     && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi \
 # Bring in curl and ca-certificates to make registering on DNS SD easier