diff --git a/.envrc b/.envrc
index 3550a30..f24f159 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1,5 @@
+if ! has nix_direnv_version || ! nix_direnv_version 2.1.1; then
+    source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.1.1/direnvrc" "sha256-b6qJ4r34rbE23yWjMqbmu3ia2z4b2wIlZUksBke/ol0="
+fi
 use flake
+export RUST_LOG=info
diff --git a/flake.lock b/flake.lock
index a51e5bc..b70764e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -36,11 +36,11 @@
     },
     "flake-utils_2": {
       "locked": {
-        "lastModified": 1637014545,
-        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
+        "lastModified": 1656065134,
+        "narHash": "sha256-oc6E6ByIw3oJaIyc67maaFcnjYOz1mMcOtHxbEf9NwQ=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
+        "rev": "bee6a7250dd1b01844a2de7e02e4df7d8a0a206c",
         "type": "github"
       },
       "original": {
@@ -113,11 +113,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1637453606,
-        "narHash": "sha256-Gy6cwUswft9xqsjWxFYEnx/63/qzaFUwatcbV5GF/GQ=",
+        "lastModified": 1656401090,
+        "narHash": "sha256-bUS2nfQsvTQW2z8SK7oEFSElbmoBahOPtbXPm0AL3I4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8afc4e543663ca0a6a4f496262cd05233737e732",
+        "rev": "16de63fcc54e88b9a106a603038dd5dd2feb21eb",
         "type": "github"
       },
       "original": {
@@ -142,11 +142,11 @@
         "nixpkgs": "nixpkgs_4"
       },
       "locked": {
-        "lastModified": 1652064227,
-        "narHash": "sha256-ZpIfELJNVzcxa6+YUr1KfbpTkHh02FASdlHaCC5/Q6w=",
+        "lastModified": 1657248581,
+        "narHash": "sha256-VSAhHCruQCFWzTz7ZSW5QLb2xIKrBGeEyEfKds4MXeY=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "31db726b18ad2620fead6e7cd31b6e57d1cd061b",
+        "rev": "6bd9919005ab6bf72464c9ebdd80f89b0cf82f97",
         "type": "github"
       },
       "original": {
diff --git a/src/config.rs b/src/config.rs
index 1b2cc5f..05edec9 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -24,12 +24,36 @@ impl fmt::Display for Action {
     }
 }
 
+#[derive(Deserialize, StaticType, Debug)]
+pub struct Actions(Vec<Action>);
+
+impl fmt::Display for Actions {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Actions(count={})", self.0.len())
+    }
+}
+
 #[derive(Deserialize, StaticType, Debug)]
 pub enum Mapping {
-    NOP,                       // Do nothing.
-    Passthrough,               // Passthrough to the layer below
-    Trigger(Action),           // Trigger an action
-    TriggerMulti(Vec<Action>), // Trigger multiple actions in sequence
+    NOP,                   // Do nothing.
+    Passthrough,           // Passthrough to the layer below
+    Trigger(Action),       // Trigger an action
+    TriggerMulti(Actions), // Trigger multiple actions in sequence
+}
+
+impl fmt::Display for Mapping {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "{}",
+            match &self {
+                Mapping::NOP => "NOP".to_owned(),
+                Mapping::Passthrough => "Passthrough".to_owned(),
+                Mapping::Trigger(act) => format!("Trigger({})", act),
+                Mapping::TriggerMulti(acts) => format!("Trigger({})", acts),
+            },
+        )
+    }
 }
 
 #[derive(Deserialize, Debug)]
diff --git a/src/main.rs b/src/main.rs
index 5e133b7..b8f907c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 mod config;
 mod device;
 
-use config::{Action, Config};
+use config::{Action, Config, Mapping};
 use hidapi::HidApi;
 use rumqttc::{Client, MqttOptions, QoS};
 use std::collections::HashMap;
@@ -88,10 +88,10 @@ impl<'a> State<'a> {
         }
     }
 
-    fn execute_mapping(&mut self, m: &config::Mapping) {
-        match m {
-            config::Mapping::Trigger(t) => self.execute_action(t),
-            _ => {}
+    fn execute_mapping(&mut self, mapping: &Mapping) {
+        match mapping {
+            Mapping::Trigger(t) => self.execute_action(t),
+            _ => event!(Level::WARN, %mapping, "Ignoring unimplemented mapping"),
         }
     }