=== modified file 'common.zsh'
--- common.zsh	2017-12-13 01:39:29 +0000
+++ common.zsh	2017-12-13 01:31:52 +0000
@@ -256,9 +256,7 @@
 	(( ${(j.|.)pipestatus} )) \
 		&& die "$0: Failed to checksum directory: ${(qqq)1}"
 	__check_deps__+='if { pipeline -d { printf "%s\n" '${(qqq)out}'} fdmove 3 1 pipeline -d { tar -cvp "--mtime=1970-01-01 00:00:00" -C '${(qqq)1}$' . } sha256sum -c /proc/self/fd/3 }\n'
-	if (($# == 2)); then
-		setvar $2 "${out%% *}"
-	fi
+	(($# == 2)) && setvar $2 "${out%% *}"
 }
 
 dep_add_dir_mtimes() {
@@ -269,9 +267,7 @@
 	(( ${(j.|.)pipestatus} )) \
 		&& die "$0: Failed to checksum directory: ${(qqq)1}"
 	__check_deps__+='if { pipeline -d { printf "%s\n" '${(qqq)out}'} fdmove 3 1 pipeline -d { tar -cvp -C '${(qqq)1}$' . } sha256sum -c /proc/self/fd/3 }\n'
-	if (($# == 2)); then
-		setvar $2 "${out%% *}"
-	fi
+	(($# == 2)) && setvar $2 "${out%% *}"
 }
 
 ifchange() {