diff --git a/users/modules/sh.nix b/users/modules/sh.nix
index d4389f8..36f4db4 100644
--- a/users/modules/sh.nix
+++ b/users/modules/sh.nix
@@ -7,4 +7,12 @@
       ai = "aichat -r %shell% -e";
     };
   };
+
+  # direnv lets us declare a .envrc in each project directory
+  # and updates the shell with the packages specified.
+  programs.direnv = {
+    enable = true;
+    enableBashIntegration = true;
+    nix-direnv.enable = true;
+  };
 }