diff --git a/install_and_cache_pkgs.sh b/install_and_cache_pkgs.sh
index 84bd0de..2f05a4c 100755
--- a/install_and_cache_pkgs.sh
+++ b/install_and_cache_pkgs.sh
@@ -64,7 +64,7 @@ log_empty_line
 installed_package_count=$(wc -w <<< "${installed_packages}")
 log "Caching ${installed_package_count} installed packages..."
 for installed_package in ${installed_packages}; do
-  cache_filepath="${cache_dir}/${installed_package}.tar.gz"
+  cache_filepath="${cache_dir}/${installed_package}.tar"
 
   # Sanity test in case APT enumerates duplicates.
   if test ! -f "${cache_filepath}"; then
@@ -75,7 +75,7 @@ for installed_package in ${installed_packages}; do
       while IFS= read -r f; do     
         if test -f $f || test -L $f; then echo "${f:1}"; fi;  #${f:1} removes the leading slash that Tar disallows
       done |
-      sudo xargs tar -czf "${cache_filepath}" -C /      
+      sudo xargs tar -cf "${cache_filepath}" -C /
     log "    done (compressed size $(du -h "${cache_filepath}" | cut -f1))."
   fi
 
diff --git a/restore_pkgs.sh b/restore_pkgs.sh
index d58c07c..e398a3e 100755
--- a/restore_pkgs.sh
+++ b/restore_pkgs.sh
@@ -31,7 +31,7 @@ log "done"
 log_empty_line
 
 # Only search for archived results. Manifest and cache key also live here.
-cached_pkg_filepaths=$(ls -1 "${cache_dir}"/*.tar.gz | sort)
+cached_pkg_filepaths=$(ls -1 "${cache_dir}"/*.tar | sort)
 cached_pkg_filecount=$(echo ${cached_pkg_filepaths} | wc -w)
 log "Restoring ${cached_pkg_filecount} packages from cache..."
 for cached_pkg_filepath in ${cached_pkg_filepaths}; do