diff --git a/config.mk.sh b/config.mk.sh
new file mode 100644
index 0000000..9471c95
--- /dev/null
+++ b/config.mk.sh
@@ -0,0 +1,7 @@
+# make.sh config
+PREFIX=${PREFIX:-/}
+USR=${USR:-"${PREFIX}usr/local"}
+
+BINDIR=${BINDIR:-"${DESTDIR}${USR}/bin"}
+LOGDIR=${LOGDIR:-"/tmp/userrc"}
+CONFIG=${CONFIG:-"/etc/userrc.conf"}
diff --git a/make.sh b/make.sh
index 03d4257..c663929 100755
--- a/make.sh
+++ b/make.sh
@@ -7,7 +7,7 @@ set_vars() {
 
 	sed -r \
 		-e "s%@CONFIG@%${CONFIG}%" \
-		-r "s%@LOGDIR@%${LOGDIR}%"
+		-e "s%@LOGDIR@%${LOGDIR}%"
 }
 
 do_tell() {
@@ -17,7 +17,7 @@ do_tell() {
 
 # Targets
 target_userrc() {
-	declare target='userrc'
+	target='userrc'
 
 	printf '%s\n' "Building $target..."
 	set_vars < "$target".in > "$target"
diff --git a/userrc.in b/userrc.in
index 9dcf5e2..b094275 100644
--- a/userrc.in
+++ b/userrc.in
@@ -67,8 +67,8 @@ get_allowed_users() {
 }
 
 runtime_config() {
-	config='/etc/userrc.conf'
-	cfg_logdir='/tmp/userrc'
+	config='@CONFIG@'
+	cfg_logdir='@LOGDIR@'
 
 	while (( $# )); do
 		case "$1" in