diff --git a/ckan/Dockerfile b/ckan/Dockerfile
index be8bfd2..b71875a 100644
--- a/ckan/Dockerfile
+++ b/ckan/Dockerfile
@@ -5,7 +5,9 @@ LABEL maintainer="brett@kowh.ai"
 # Set timezone
 ARG TZ
 RUN echo $TZ > /etc/timezone
-RUN cmp /usr/share/zoneinfo/${TZ} /etc/localtime || cp /usr/share/zoneinfo/${TZ} /etc/localtime
+RUN if ! [ /usr/share/zoneinfo/${TZ} -ef /etc/localtime ]; then \
+        cp /usr/share/zoneinfo/${TZ} /etc/localtime \
+    fi
 
 # Install any extensions needed by your CKAN instance
 # (Make sure to add the plugins to CKAN__PLUGINS in the .env file)