diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..2cd5d7d
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# ^ for code highlighting
+# Used by https://direnv.net
+
+source_url "https://raw.githubusercontent.com/cachix/devenv/d1f7b48e35e6dee421cfd0f51481d17f77586997/direnvrc" "sha256-YBzqskFZxmNb3kYVoKD9ZixoPXJh1C9ZvTLGFRkauZ0="
+
+# Initialise devenv
+use devenv