diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..4a4726a
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use_nix
diff --git a/.gitignore b/.gitignore
index 41e826d..ac6bdd2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,5 @@
 *.ai
 *.svg
 *.dxf
+
+.direnv
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..4f40e44
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,4 @@
+{ pkgs ? import <nixpkgs> {} }:
+  pkgs.mkShell {
+    nativeBuildInputs = with pkgs.buildPackages; [ clojure leiningen openscad ];
+}