diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..3550a30f
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/flake.nix b/flake.nix
index a68b6fa9..28d29180 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,5 +45,18 @@
       };
       default = caelestia-shell;
     });
+
+    devShells = forAllSystems (pkgs: {
+      default = let
+        shell = self.packages.${pkgs.system}.caelestia-shell;
+      in
+        pkgs.mkShellNoCC {
+          inputsFrom = [shell];
+          packages = [pkgs.material-symbols];
+          shellHook = ''
+            export CAELESTIA_BD_PATH=${shell}/bin/beat_detector
+          '';
+        };
+    });
   };
 }