diff --git a/build.sh b/build.sh
index 3e095c5..10bd086 100755
--- a/build.sh
+++ b/build.sh
@@ -1,10 +1,10 @@
 #!/bin/bash
 LUA=${LUA:-lua}
-KVAR=${1:-lua}
+KVAR=${1:-base}
 rm -r target/*
 mkdir -p target/doc &>/dev/null
 $LUA build.lua kcfg/$KVAR.cfg target/init.lua
-echo _OSVERSION=\"PsychOS 2.0a3-$(git rev-parse --short HEAD)\" > target/version.lua
+echo _OSVERSION=\"PsychOS 2.0a3-$(git rev-parse --short HEAD)-$KVAR\" > target/version.lua
 cat target/version.lua target/init.lua > target/tinit.lua
 mv target/tinit.lua target/init.lua
 cp -r service/ lib/ cfg/ exec/ target/