diff --git a/phones/default.nix b/phones/default.nix
new file mode 100644
index 0000000..48433d5
--- /dev/null
+++ b/phones/default.nix
@@ -0,0 +1,6 @@
+{ inputs, ... }:
+{
+  flake.robotnixConfigurations = {
+    eris = inputs.robotnix.lib.robotnixSystem ./eris/default.nix;
+  };
+}
diff --git a/phones/eris/default.nix b/phones/eris/default.nix
new file mode 100644
index 0000000..c6b2c3f
--- /dev/null
+++ b/phones/eris/default.nix
@@ -0,0 +1,17 @@
+{ ... }:
+{
+  flavor = "grapheneos";
+  device = "lynx";
+
+  grapheneos = {
+    channel = "stable";
+  };
+
+  apps.fdroid.enable = true;
+
+  # Enables ccache for the build process. Remember to add /var/cache/ccache as
+  # an additional sandbox path to your Nix config.
+  ccache.enable = true;
+
+  stateVersion = "3";
+}