diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..1d953f4
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use nix
diff --git a/.gitignore b/.gitignore
index a806510..e003f90 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 result
 result-*
 
+.direnv