diff --git a/shell-modules/env.nix b/shell-modules/env.nix
new file mode 100644
index 0000000..ea842e5
--- /dev/null
+++ b/shell-modules/env.nix
@@ -0,0 +1,11 @@
+{ lib, ... }:
+
+with lib;
+{
+  options = {
+    env = mkOption {
+      type = types.attrsOf types.str;
+      default = [ ];
+    };
+  };
+}