env vars
diff --git a/env.sh b/env.sh
new file mode 100755
index 0000000..ba4f223
--- /dev/null
+++ b/env.sh
@@ -0,0 +1,5 @@
+
+ # you need to export this whenever you start a new shell
+export OPENLANE_ROOT=../openlane
+
+export PDK_ROOT=../pdks