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
new file mode 100644
index 0000000..8361884
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.direnv/*
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..b174e44
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,9 @@
+{ pkgs ? import <nixpkgs> {} }:
+let
+  my-python-packages = ps: with ps; [
+    opencv4
+    numpy
+    # other python packages
+  ];
+  my-python = pkgs.python3.withPackages my-python-packages;
+in my-python.env