diff --git a/tools/ess-env.conf b/tools/ess-env.conf
new file mode 100644
index 0000000000000000000000000000000000000000..326f21527fc3b615fb3c86562b84e9a1b7c7cb98
--- /dev/null
+++ b/tools/ess-env.conf
@@ -0,0 +1 @@
+IOCSH_HASH_VERSION=d3c308e