=== modified file 'common.zsh'
--- common.zsh	2017-12-13 01:14:29 +0000
+++ common.zsh	2017-12-13 01:13:24 +0000
@@ -212,7 +212,7 @@
 
 # dependency tracking
 dep_add_file() {
-	(($# < 3)) || die "usage: $0 <filename> [<variable>]"
+	(($# < 2)) || die "usage: $0 <filename> [<variable>]"
 	local out
 	out=$(sha256sum $1) || die "$0: Unable to checksum: ${(qqq)1}"
 	__check_deps__+='if { test -e '${(qqq)1}$' }\n'
@@ -238,7 +238,7 @@
 }
 
 dep_add_dir() {
-	(($# < 3)) || die "usage: $0 <filename> [<variable>]"
+	(($# < 2)) || die "usage: $0 <filename> [<variable>]"
 	[[ -d $1 ]] || die "$0: ${(qqq)1} does not exist or not a directory"
 	local out
 	out=$(tar -cvp -C $1 --mtime=1970-01-01 . | sha256sum -)
@@ -249,7 +249,7 @@
 }
 
 dep_add_dir_mtimes() {
-	(($# < 3)) || die "usage: $0 <filename> [<variable>]"
+	(($# < 2)) || die "usage: $0 <filename> [<variable>]"
 	[[ -d $1 ]] || die "$0: ${(qqq)1} does not exist or not a directory"
 	local out
 	out=$(tar -cvp -C $1 . | sha256sum -)