diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index b2be92b..726d2d6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 result
+.direnv
diff --git a/flake.nix b/flake.nix
index 80680df..4815e96 100644
--- a/flake.nix
+++ b/flake.nix
@@ -12,6 +12,9 @@
     in
     {
       packages.dropworld = pkgs.callPackage ./dropworld {};
+      devShells.default = pkgs.mkShell {
+        buildInputs = with pkgs; [bpftools bpftop];
+      };
     }
   );
 }