diff --git a/nix/cache.nix b/nix/cache.nix
index 2305640..daadc80 100644
--- a/nix/cache.nix
+++ b/nix/cache.nix
@@ -20,7 +20,10 @@ in writeShellApplication {
 		packer
 	];
 	text = ''
-		mc alias set storage "$STORAGE_URL" root "$MINIO_SECRET"
+		push="''${1:-yes}"
+		if [ "$push" == "yes" ]; then
+			mc alias set storage "$STORAGE_URL" root "$MINIO_SECRET"
+		fi
 		mkdir -p cache
 	'' + (concatStringsSep "\n" (
 		map (d: ''
@@ -29,7 +32,9 @@ in writeShellApplication {
 			# shellcheck disable=SC2143
 			if [ -z "$(mc ls storage/isos/cache/ | grep "$sha")" ]; then
 				curl -L --retry 3 --retry-all-errors -o "cache/$sha.iso" "$url"
-				mc put "cache/$sha.iso" "storage/isos/cache/$sha.iso"
+				if [ "$push" == "yes" ]; then
+					mc put "cache/$sha.iso" "storage/isos/cache/$sha.iso"
+				fi
 			else
 				echo "Skipping ${d.distro} - cache/$sha.iso"
 			fi